Mama Sue’s Diner

About

Diners

Price Range : $11-30 ($$)

  • star
    Yelp rating
    3 stars

Location

Adress: 850 Boundary Road Unit 1, Cornwall, ON K6H

Phone: (613) 933-9055

Work Hours

Mon 6:00 am-2:00 pm
Tue 6:00 am-2:00 pm
Wed 6:00 am-2:00 pm
Thu 6:00 am-8:00 pm
Fri 6:00 am-8:00 pm
Sat 6:00 am-2:00 pm
Sun 6:00 am-2:00 pm

Business info

  • accessibility
    Good for Kids
    Yes
  • group
    Good for Groups
    Yes

Reviews

  • Sara C.

    star star star star_border star_border 8 June 2026

    Having grown up around the Cornwall, Ontario area, and knowing the owner once upon a time I may be a little biased. So here goes an attempt at a review without special treatment.

    The food is regular diner food but with a gigantic, funny, loveable smile. The owner, Sue (in case the name of the restaurant eluded you) is an amazing woman. You don't like something? She'll change it or fix it! You're having a rough day? She'll probably make you laugh or smile and then throw in a free coffee and slice of pie!

    I don't think the menu showcases her homemade donuts (and if they don't then haha too bad for you because they were delicious!) but the rest is pretty great home cooking. It's also affordable which is nice.

    If you're not into meatloaf, or house salads, homemade soups and all those other great things mom stopped making for you when you moved out and starting doing your own laundry - then this isn't the place for you!

    I would have given four stars had the restaurant already been listed on yelp. Unfortunately, as is custom with French-Canadian women (and men), social networking for business isn't necessary. They have enough friends and family to get by and then some! But this is a great start to getting the word out about a lovely little atmosphere and place to grab a bite!

    **Beware the coffee is terrible. Investment in purchasing a couple different brands, freshly grinding the beans and making a specialty house brand would be greatly beneficial! Mama Sue's Diner and Mama Sue's Coffee.

  • Wolfgang L.

    star star star star_border star_border 3 June 2026

    Mama Sue's is similar to other breakfast-centric restaurants in Cornwall. The food is simple, and has a home-made vibe to it. Like many restaurants in the area the service is friendly for regulars. I have been here a few times, and although it's not exciting, it is dependable.

  • Natasha P.

    star star star star_border star_border 27 May 2026

    Service was alright. Food is pretty much what you would expect. I got the bacon cheeseburger with fries. The fries were not crispy at all, but had a decent taste. The "all dressed" burger was a bit much for my tastes, it comes with Tomato, Onion, Relish, Mustard, Ketchup, Pickles I personally don't like that much stuff on my burger but that's a personal preference. The burger itself was good, the bacon was nice and crispy.

  • Mike D.

    star star star star_border star_border 26 May 2026

    Good place for breakfast. However when I went there for dinner, the stir-fry was the worst I've ever had, and not worth the amount it had cost me. I'll be returning here for breakfast only.

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