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Click a letter to view a list of terms beginning with that letter. After choosing a letter, click a name or term to see associated records.
Search Terms
- MacAlister Park
- Macalister's Summer Camp
- Mac Avenue
- Mac Chemical Enterprises
- Macdonald (A.H.) Barrister
- Macdonald and Company
- Macdonald and Drew Barristers
- MacDonald and MacDonald
- Macdonald Block
- Macdonald Club
- MacDonald (Colin) Construction
- MacDonald (Colin) Mortgage Consultant
- Macdonald Consolidated School
- Macdonald (D.E.) and Brothers
- Macdonald (D.G.) Coal
- MacDonald Electric Limited
- Macdonald (Evan) Artist
- Macdonald (H.) Dry Goods
- Macdonald Heating and Air Conditioning
- Macdonald Manufacturing Company
- Macdonald's Clothes for Men
- MacDonald's Restaurant
- Macdonald Stewart Art Centre
- MacDonald Street
- Macdonell / Cork Street Parking Lot
- Macdonell Street
- Macdonell Street Bakery
- Macdonell Street Grill
- MacGregor (M.O.) Attorney
- Machen Furniture
- Machine Control Systems
- MacIntyre (Gilbert) and Son Funeral Home
- Mackan Group Ltd.
- MacKay Electric
- MacKay (J.F.) and Company Ltd.
- Mack (Bob) Shell Station
- Mack Coal Company
- Mackenzie (Alex) Malt House
- Mackenzie Machinery Company
- Mackenzie Rebellion
- MacKenzie's Snowplowing
- MacKey's Bread Limited
- Mack (H.G.) Bird Breeder
- MacKinnon (Dr. A.) Physician
- MacKinnon (John P.) Physician
- MacKinnon Transport Ltd.
- MacLaren's Barber Shop
- Maclean-Hunter Cable Television
- MacLean-Hunter Cable Television
- Maclean (Kenneth)
- MacLeods Scottish Shops of Dunvegan
- Macmillan and Company Limited
- MacMillan and O'Connor Barristers
- MacMillan-Bloedel Packaging
- MacMillan's Beauty and Barber Centre
- Macondo Books
- Mac's Auto Collision
- Mac's Milk
- Mac's Supertest Service
- MacTavish (A.A.) Barrister
- MacWilliam and Leitch Confectioners
- Maddock and Barron Men's Clothing and Furnishings
- Maddock's Pharmacy
- Maddocks (William) Cigars
- Made in Canada Fair and Poster Show
- Made In Guelph Exhibition
- Madsen (Peter) Landscaping
- Maggot Fodder
- Magic 106.1 Radio
- Magic Mountain Trading Company Inc.
- Magna Charta Day
- Magna International Company
- Magoo's
- Magoo's Slo-Pitch Team
- Maharishi Unisex
- Maher Shoe Store
- Mahoney and Chase
- Mahoney Block
- Mahoney Brothers Plumbers
- Mahoney Building Company Limited
- Mahoney (J.J.)
- Mahoney (R.C.) Dental Surgeon
- Mahon's Real Estate Exchange
- Main Artory Graphic Designs
- Maitland (H.K.) Vocal and Instrumental Music Teacher
- Majestic Plumbing and Heating Supplies
- Make 1
- Malabar
- Malcolm Road
- Mall (The)
- Mall Tool Limited
- Malone Brothers Limited
- Malone Tobacco Shop
- Malt House of Murton and Company
- Malt Products Company of Canada
- Malvern Avenue
- Mammy's Bread
- Manchester Street
- M and C Motors
- Mandel Scientific
- M and M Mechanicals Ontario Ltd.
- M and N Motors
- M and T Insta-Print
- Mango Imports
- Manhattan Court
- Manhattan's Pizza and Pasta
- Manitoba Street
- Mann Construction Ltd.
- Manning Motor Car Ltd.
- Mann Made Belts
- Manor Motor Hotel
- Manor Park
- Manor Park Crescent
- Manor Property Maintenance
- Manor (Sleeman Home)
- Manor (The) Restaurant
- Mansion Homes
- Manton Realty
- Manufacturer's Life Insurance Company
- Manufacturers Life Insurance Company
- Manulife Financial
- Maple Apartments
- Maple Bank
- Maple Green Townhouses
- Maple Lane Dairy
- Maple Leaf Bakery
- Maple Leaf Baseball Club
- Maple Leaf Baseball Club - Juniors
- Maple Leaf Bus Lines
- Maple Leaf Candy Shop
- Maple Leaf Gas Bar
- Maple Leaf Mills
- Maple Leaf Motor Service
- Maple Leafs Hockey League
- Maples Inn II
- Maple Street
- Mapleview Farm
- Maplewood Drive
- Maplewood Farm (Erin)
- Marans and Hertzberg
- Marblelike Products
- Marble Works
- Marco Aluminum
- Marcon Street
- Marcon (W.H.) Seedsman
- Marcon (W.H.) Tobacco
- Marden Concrete
- Marden Mercantile Company
- Marden School
- Margaret Street
- Marg-John Shoppe
- Margles
- Marguerite's Young Fashions
- Marianne's Park
- Mari Design Shop
- Marilyn Drive
- Marilyn's Hair Design
- Marion Elizabeth Restaurant
- Marion's Lunch
- Marion's Shop
- Marjorie's Salon
- Market Bakery
- Market Building
- Market Cafe
- Market Fresh
- Market House
- Market Lanes
- Market Parkade, 10 Wilson Street
- Market Square
- Market Street
- Markle (Herb) Park
- Marksam Park
- Marksam Road
- Marks and Spencer
- Mark's Piano Service
- Marlborough Road
- Maroon Hockey Team
- Marquart Delicatessan
- Marriott and Company Florist
- Marriott (E.S.) Florist
- Marriott (J.) Florist
- Marriott (J.) Veterinary Surgeon
- Marron Glace
- Marshall (A.E.) Photography
- Marshall and Lyon Photographers
- Marshall Construction
- Marshall Field Company
- Marshall, Macklin, Monaghan Ltd.
- Marshall's Drug Store
- Marshall's Fancy Goods
- Marshall (W.) Photography
- Marsh Tire Service
- Martin and Cameron
- Martin Avenue
- Martinello Plumbing and Heating
- Martini Painting
- Martini (Terry) Construction
- Martin (John) Trio
- Martin (Mima) Band
- Martin (P.) Plasterer
- Martin's Electrical Service
- Martlin and Lawrie Ltd.
- Marty's Snack Bar
- Marvellous Tea Store
- Mary and Ann's Beauty Salon
- Mary and Bill's Confectionery
- Mary and Bill's Service Station
- Mary Brown's Chicken
- Marymount Cemetery
- Maryon (John) and Partners
- Mary Street
- Mason and Risch
- Mason Beverages
- Mason Bond Realty
- Mason Brothers Ltd. Volkswagen
- Mason Court
- Mason Ford Dealership
- Masonic Block
- Masonic Temple
- Mason Motors
- Mason Real Estate Ltd.
- Mason (Roy) and Sons - Grocer
- Masons
- Masons - Antiquity Lodge No. 571
- Mason's Arena (Cambridge Street)
- Masons - Grand Chapter of the Royal Arch
- Masons - Guelph Chapter No. 40
- Masons - Guelph Lodge 258
- Mason's Marketeria
- Masons - Prince of Wales Lodge
- Masons - Royal City Daylight Lodge No. 742
- Masons - Royal City Lodge of Perfection
- Masons - Speed Lodge
- Masons - Trillium Lodge No. 724
- Masons - Waverly Masonic Lodge
- Masons - Wellington Lodge No. 33
- Masons - Wyndham Lodge No. 688
- Massey-Ferguson
- Massey-Harris
- Massey Road
- Massey's Magazine
- Massie and Campbell
- Massie (James) and Company
- Massie, Paterson and Company
- Massie's Salt Yard
- Massie, Weir and Bryce
- Masson and Dodge Machinery Movers
- Master Cleaners
- Master Craft Uniform Company
- Master Electric Company
- Master Feeds
- Matador Fitness
- Matrix Affordable Homes
- Matrix Apartment Building
- Matrix Centre
- Mattheis Realty
- Matthews (Alex) Beverages
- Matthew's Barbershop
- Matthews Brothers Carriages
- Matthews, Reid and Company Carriages
- Matthews (T.) Mason
- Matthews-Wells Company Ltd.
- Matthews (W.P.) Harness Maker
- Matthew-Wells Company Ltd. (Use Matthews-Wells Company Ltd.)
- Maude Major
- Maud Greenhouse
- Mavis Bank (Lemon Home)
- Max Auto Collision
- Maxwell (Peter) Mens Wear
- Maxwelton
- Mayberry's Shoe Store
- Mayday Fire and Safety Equipment
- Mayes (James) Used Cars
- Mayfern Textiles
- May Festival
- Mayfield Avenue
- Mayfield Park
- Maylor Auto Sales
- Mayors
- May's Block
- Mays' Hill
- Mays (James) Fanning Mill
- Mazda
- McAllister's Sawmill
- McAninch (J.J.) Realty
- McArthur Construction Company
- McArthur's Shoe Store
- McArthur-Walkwel Shoes
- McAuley (J. David) Architect
- McBain Saw Shop
- McBean and Company Hardware
- McBurney and Moser Ladieswear
- McCabe (B.J.) Realty Agency
- McCabe’s Irish Pub & Grill
- McCall Crescent
- McCall's Groceteria
- McCandless Coal
- McCannell (A.M.) Sand and Gravel
- McCarter (A.B.) Physician
- McCarthy (B.) Trim
- McCarthy (Charlie)
- McCartney (W.R.) Tailor
- McCarvell Plumbing and Heating
- McCarvell's Shoe Repairing
- McClean School
- McCloskey's Serv-Us
- McColl - Frontenac Oil Company
- McConnell Carriage Works
- McCormack and Robinson
- McCormack and Zettel
- McCormick and Zettel
- McCracken (T.G.)
- McCrae and Company Woollen Mills
- McCrae - Artillery
- McCrae - Birthplace
- McCrae Birthplace Society
- McCrae - Boer War
- McCrae - Bonfire
- McCrae - Bonneau
- McCrae Boulevard
- McCrae (Charles) Dry Goods
- McCrae - Childhood
- McCrae - Clan
- McCrae Coal and Wood Yard
- McCrae (Col. John) Memorial Pipe Band
- McCrae - Commemoration
- McCrae - Death
- McCrae - Doctor
- McCrae - Earl Grey Trip
- McCrae - Elementry Education
- McCrae - Essex Field Dressing Station
- McCrae - First Day of Issue
- McCrae - Funeral
- McCrae - Gravesite
- McCrae - Highland Cadets
- McCrae - Homes
- McCrae House
- McCrae - In Memoriam
- McCrae (John) Public School
- McCrae - Kennebunkport Maine
- McCrae - McGill University
- McCrae - Medical Writing
- McCrae Memorial Gardens
- McCrae - Montreal General Hospital
- McCrae - Mount Airy, Maryland
- McCrae - No. 3 Canadian General
- McCrae - Ontario Agricultural College
- McCrae - Poems
- McCrae - Robert Garrett Hospital Maryland
- McCrae - Royal Alexandra for Infectious Diseases
- McCrae - Royal Military College
- McCrae - Royal Victoria Hospital
- McCrae - Rugby
- McCrae - Scientific Society
- McCrae - Secondary Education
- McCrae - Sheet Music
- McCrae - Short Stories
- McCrae - Singing
- McCrae - Sketches
- McCrae - Stamp
- McCrae - Theatre
- McCrae - Toronto General Hospital
- McCrae - Travels
- McCrae - University College
- McCrae - University of Toronto
- McCrae - Varsity Glee Club
- McCrae - Wahwashkesh
- McCrae - Wellington Field Battery
- McCrae - Wimereux Cemetery
- McCrae - Wood's Hole
- McCrae - World War 1
- McCrae - Zeta Psi Fraternity
- McCrea (J.A.) and Son
- McCrea (R.J.)
- McCrea's Branch Store
- McCrudden (Eddie) and His Orchestra
- McCullough and Moore
- McCullough-Shuh Appliances
- McCullough (Stan) Appliances
- McCurdy Road
- McCutcheon (R.R.) Farm Machinery
- McCutcheon (William) and Sons
- McDermid's Restaurant
- McDermott (H.J.) Painting and Decorating
- McDermott (J.A.) Funeral Director
- McDonald and McDonald Barristers
- McDonald Currie
- McDonald (James) Auctioneer
- McDonald's Restaurant
- McDougald (Neil) Appliance Service
- McEachern's Super Test Service Station
- McElderry and McCrea
- McElderry and Morris
- McElderry (J.E.) China and Crockery
- McElderry (John H.) Barrister
- McElderry Road
- McElroy (H.J.) Monuments
- McElroy Marble Works
- McEwan (Don) Painting
- McEwan's Tobacco Shop
- McFarland Seed Company
- McFarlane (J.A.)
- McGar (E.S.) Chiropractor
- MCG Construction
- McGee's Esso Service
- McGees Esso Service
- McGee Street
- McGibbon (A.) Fruits and Groceries
- McGinnis Landing Restaurant
- McGowan (John C.) Barber Shop
- McGregor (A.) Carpets and Rugs
- McGregor (Bill) Salvage
- McGregor (Gerald) Photography
- McGregor (J.A.) and Son Building Contractors
- McGregor (James) Insurance
- McGregor (R.) Shoes and Boots
- McGregor's Sportswear
- McGuire (E.W.) Doctor
- McGurn Electric
- McHardy (A.) Pork Packer
- McHardy (J and A) Pork Packers
- McHardy's Limited
- McHugh Brothers
- McInnis Equipment
- McIntosh and Galbraith
- McIntosh (John W.) Tile Manufacturer
- McIntosh (T.) Carriage Builder
- McIntyre and Greenaway Funeral Directors
- McIntyre and Wilkie Funeral Home Ltd.
- McIntyre (E.F.) Funeral Home
- McIntyre (John) Collection Service
- McIntyre Motors
- McIntyre's Drug Store
- McKee Brothers
- McKee (J.D.) Dispensing Chemist
- McKee's IDA Drug Store
- McKellar (Frank) Insurance
- McKen Gas Services Ltd.
- McKenna and La Fontaine
- McKenna Brothers Limited
- McKenna Plumbing and Appliances
- McKenna Sporting Goods Store
- McKenna (T.F.) Bicycles
- McKenna (W.) Upholsterer and Carpet Layer
- McKenzie (Alex) Cabs and Coupees
- McKenzie Brothers Trucking and Excavating
- McKenzie (D.) Shoeing Forge
- McKenzie Machine Works
- McKenzie (Roderick) Horseshoeing and Blacksmithing
- McKenzie Studio
- McKeon (L.J.) Gentlemans Furnishings
- McKersie (E.) Barber
- McKim (W.A.) Dress Goods
- McKinnon and Howitt Barristers
- McKinnon (D.G.) Insurance
- McKinnon (Dr. A.) Physician
- McKinnon (R.L.) Barrister
- McLagan and Innes General Book and Job Printers
- McLanaghan and Ross Funeral Directors
- McLanaghan-Wall Funeral Directors
- McLaren (A.M.) and Company Tea Merchants
- McLaren and Miller
- McLaren (D.) Shoemaker
- McLaren (R.W.) and Company
- McLaren (W.) and Company
- McLaughlin-Buick Cars
- McLaughlin (J.J.) Metropolitan Life Insurance
- McLean and Dawson Electrical Contractors
- McLean and McLean Barristers
- McLean Building
- McLean (F.C.) and Son
- McLean (J.C.) Music Store
- McLean Optical
- McLean's Confectionery
- McLeod (Agnes) Hat Shop
- McLeod, Wood and Company
- McMahon (Russell) Tinsmith
- McMaster University
- McMillan and Dunbar Barristers
- McMillan Brothers
- McMillan (Hugh) Barrister
- McMillan's Beauty and Barber Centre
- McMillan's Confectionery
- McMillan's Family Hair Styling
- McNab and Martin Attorneys
- McNally (J.H.) Studebaker Dealer
- McNally's Garage
- McNamara Carpets
- McNaughton (Ron) Tobacconist
- McNaughton's Plumbing, Heating and Repairs
- McNeil Consumer Products
- McNeil Consumer Products Company
- McNeil's Boot and Shoe Factory
- McNiven (A.) Funeral Director
- McNiven and York Furniture Dealers
- McNiven's Ambulance Service
- McPhee Florists
- McPherson Brothers Clothiers
- McPherson (R.H.) Barber Shop
- McPhie and Mahoney Architects
- McQuillan and Hamilton
- McQuillan Block
- McQuillan's Bridge
- McTague Cottage
- McTague (J.J.) Jewellers
- McTague (J.S.) Insurance
- McTague Street
- McTague's Watch and Jewellery Repair
- McTavish Law Office
- McVane (Thomas) Store
- McVicker (George) Painting and Decorating
- MDS Laboratories
- Meadowview Avenue
- Meadowview Baptist Church
- Meadowview Mission
- Meadowville Garden Centre
- Meals On Wheels
- Mechanical Welding
- Medallion Aluminum
- Medical Hall
- Mega Warehousing
- Meggs and Stephenson Meat Market
- Meistersingers
- Melmac Colonial Limited
- Melran Holdings
- Melran Mall
- Melrose Dying
- Meltech Industries
- Melville Street
- Melvin Home
- Melvin's Foundry
- Memorial Crescent
- Memorial Crescent Park
- Memorial Gardens Arena
- Memorial Gardens Arena Concession Booth
- Memorial Gardens Commission
- Memorial Society of Guelph
- Memory Lane Band
- Mental Health Association
- Menzie Avenue
- Mercantile Brokers Limited
- Mercer and Casey Sashes and Doors
- Mercer (Paul) Shoes
- Mercer's
- Mercer Street
- Merchants Bank
- Merchants Bank Building
- Meriden Britannia Company
- Meridian Coffee House
- Merion Street
- Merit Glass
- Merit Glass Ltd.
- Merit Manufacturing Company
- Merle Norman Studio
- Merlihan (G.J.) Company Carpets and Draperies
- Merrick Heating and Sheet Metal Company
- Merri-Eights Square Dance Club
- Merri-Four
- Merrit Boulevard
- Merton Mill
- Metalumen
- Metcalf (E.)
- Metcalfe Street
- Metcalf (Henry) Harnessmaker
- Metronics Corporation Limited
- Metropole Cigar Store
- Metropolitan Bank
- Metropolitan Industries
- Metropolitan Life Insurance Company
- Metropolitan Opera Company
- Meyer Drive
- Meyer Industrial Distributors Ltd.
- Meyer Insulation Ltd.
- Meyers Studios
- Michael House
- Michael Place
- Micheal's Engraving
- Michener Road
- Mickey Mouse
- Mickey's Hardware
- Micmac Industrial Products
- Micro-Plastics
- Micro Tech Hearing Systems Inc.
- Midas Muffler
- Middleton (W.)
- Midland Doherty
- Midland Walwyn
- Midland Walwyn Capital Inc.
- Midnight Lace
- Midnight Sun tanning
- Midtown Dining
- Midtown Motors
- Midtown Wellington Developments Ltd.
- Mid-Western Development Association
- Miijidaa Cafe and Bistro
- Mike's Guelph Coin Exchange
- Mike's Quality Meats
- Mike the Mover
- Milady's Clothing Store
- MiLady's Clothing Store
- Milburn (Bill) Sales
- Miles, Leslie
- Milla (George) Construction Ltd.
- Milla Properties
- Millar (J and R) Butchers
- Millcroft Inn
- Millennium Clothing Company
- Miller (Eric) Insurance Agency
- Miller's Barber Shop
- Millie's Confectionary
- Milligan (Jack) General Insurance
- Mill Lofts
- Millman and Company
- Mills (Alice) Interiors
- Mills and Goodfellow Foundry
- Mills and Melvin Foundry
- Mills (A.) Stoves, Furnaces, Lamps and House Furnishings
- Mills Auto Supplies
- Mills' Old Stand
- Mills, Spence and Company
- Mill Street
- Mill Studios
- Mills (W.H.) Stove Manufacturing Company
- Milne (J.C.) Realty
- Milner Ross and Company
- Milton's Meat Market
- Mimi's
- Min-A-Mart
- Minit Lube
- Minnie Street
- Mino (Nelson) Texaco Service
- Minuteman Press
- Miracle Food Mart
- Miracle Foot-Aid
- Mirotta (Nat) Men's Clothier
- Misener Farm Management
- Misener (H.B.) Dental Surgeon
- Misener's Variety
- Misersky (Peter) Park
- Miss Guelph Pageant
- Miss Holody Plater
- Mississauga Shrine Club
- Mister Transmission
- Mitchell and Company Funeral Services
- Mitchell and Tovell Undertakers and Furniture Dealers
- Mitchell (Austin M.) Undertaker
- Mitchell Farm Public School
- Mitchell (H.S.) Insurance
- Mitchell (John) Undertaker
- Mitchell Maintenance Company
- Mitchell Park
- Mitchell (Robert) Grocer
- Mitchell's Fruit Market
- Mitchell's Hotel
- Mitchell (Steve) Auto Body Ltd.
- Mitchell Street
- Mitchell (Thomas) Boot and Shoe Store
- Mitchell (W.F.) and Company
- Mizen (J. Wayne) Annuity Quotations
- Moch's Barber Shop
- Model Bakery
- Model Dairy
- Modele Mystique Modeling Agency
- Model Farm (Use Guelph Model Farm)
- Model Flying Club
- Model Trousers
- Modern Beauty Salon
- Moderne-Age
- Modern Fur Stylists
- Modern Grille
- Modern Heating
- Modern Paper Box Company Ltd.
- Modern Shoe Repair
- Moffat and Company
- Moffatt Brothers Painting
- Moffatt (John S.)
- Moffitt Print Craft
- Mohawk Drive
- Moldcraft Plastics Ltd.
- Moldmet Ltd.
- Mollison Park
- Molloy and Finlay Barber Shop
- Molton and Armstrong
- Molto (Pat) TV Tower and Aerial Service
- Monaco Light Gallery
- Mona Lisa Beauty Studio
- Monarch Building
- Monarch Road
- Mondex
- Money Strat
- Monico (Trank) Barber Shop and Hairstylists
- Monique Fashion Shoes
- Monkey Bridge
- Monkhouse Chopping Mill
- Monkhouse (J.L.) Grocer
- Monk (Merv) and Sons Orchard Produce
- Montana Road
- Monte's Place
- Montgomery Street
- Monticello crescent
- Monticello Crescent
- Montreal Life Insurance Co.
- Montreal Road
- Montreal Tea Store
- Montreal Trust
- Mont Street
- Mooney (George) Contractor Limited
- Mooney's Duco Shop
- Moon, Heath, Hamilton and Farley Barristers and Solicitors
- Moore and Armstrong's Dry Goods Store
- Moore Avenue
- Moore Business Forms
- Morden and Helwig Limited Insurance Adjusters
- More (J.E.) Parcel Delivery
- More (Max) Valves Limited
- Moreton Lodge
- Moreton Lodge Portico
- Morgan (E.G.) Podiatrist
- Morlock Brothers
- Morrell (G.H.) Contractor
- Morris and Tessier Limited
- Morris (G.B.) Hardware
- Morris Harness Maker
- Morrison, Hershfield, Theakston and Rowan Ltd.
- Morrison Motors
- Morrison's Barber Shop
- Morrissey (Edward) Technical Services
- Morris Street
- Morris (W.H.) Groceries
- Morrow and Bowen Insurance
- Morrow and Dorland Publisher
- Morrow and Nicholson Law Office
- Morrow (Roy J.) General Insurance
- Mortgage Architects
- Mortgage Intelligence
- Mort's Confectionery
- Mosborough Women's Institute
- Moss Garage
- Moss Smolack
- Motel Biltmore
- Mother Goose Nursery School
- Mother's Pizza-Pasta Restaurant
- Motor Men
- Motor Vehicle License Bureau
- Moulton and Bish Tannery
- Mountain Magic Trading Company
- Mountclair Apartments
- Mountford Drive
- Mount Street
- Mount Tara
- Mowat and Dawson Barristers and Solicitors
- Mowat Law Firm
- Mowat's Cigar Store
- Mowatt (M.) Meats
- Moxley Brothers
- Moyer and Allan Law Office
- Moyer and Malak Barristers, Solicitors, Notaries
- Moynham Television
- MP
- MPP
- Mr. Bookkeeper Ltd.
- Mr. Casual Quality Sportswear
- Mr. Frank's Mens Shop
- Mr. Greek Cafe
- Mr. Greek Café
- Mr. Jay's Sir Loin Room
- Mr. Joe's Meat and Cheese
- Mrs. B's Gift House
- Mr. Submarine
- Mr. Zucci's
- Muer Construction Ltd.
- Muldoon Builders
- Mulholland (H.) Hardware and Iron Merchants
- Muller Brothers
- Muller Woodcraft
- Mullin (Bruce) Heating and Air Conditioning
- Mullin Electric
- Mulroney and Carter
- Munder Tungsten Lamp Company
- Municipal Emergency Government Shelter (MEGS)
- Municipal Review (The)
- Municipal Street
- Municipal Street Plaza
- Murchey (A.) and Company
- Murphy and Cartledge Cigar and News Store
- Murphy and Hughey Tobacconists
- Murphy and Jones News Agents
- Murphy and McDougall Real Estate
- Murphy and Mowat Tobacco and News
- Murphy House
- Murphy (Jim) TV Services
- Murphy Paint Store
- Murphy's News and Tobacco
- Murray (G.D.) Drafting Services
- Murray (George) Woolen Mill
- Murton (George) Coal
- Murton's (Harry) Mill
- Musagetes
- Music Group
- Musicians’ Performance Trust Fund
- Music In Orbit
- Music Man Record Shops Ltd.
- Muskoka Drive
- Muslim Society of Guelph
- Mustang Drive-In Theatre
- Mutual Electric Service Company
- Mutual Fire Insurance Company
- Mutual Insurance Society
- Mutual Life Assurance Company
- Mutual Life Insurance
- Mutual Service Garage
- Mutual Street
- Mutual Supply Wholesale Tobacco
- Muysson (Hertha) Fashion Designer
- Myers Cigar Company
- M-Y Mobile Homes Ltd.