Cosmos Diner - Your Cozy Dining Destination in Thorold

Welcome to Cosmo's Diner, a charming culinary gem nestled in Thorold, Ontario. This welcoming, women-owned establishment effortlessly combines retro charm with modern comforts, offering wheelchair accessibility and a cozy atmosphere perfect for families, university students, and travelers alike. Renowned for its diverse menu, Cosmo's shines especially during breakfast and brunch. Signature dishes like Breakfast Lasagna and Breakfast Poutine are tantalizing crowd-pleasers, highlighting a delightful fusion of flavor and creativity. With its friendly staff and vibrant decor, every visit feels like a cherished reunion. Come for the food, stay for the warmth—Cosmo's Diner truly embodies community and comfort.

Accessibility
- Has wheelchair-accessible car park
- Has wheelchair-accessible entrance
- Has wheelchair-accessible seating
- Has wheelchair-accessible toilet
From the business
- Identifies as women-owned
Service options
- Offers kerbside pickup
- Has no-contact delivery
- Offers delivery
- Offers takeaway
- Serves dine-in
Highlights
- Has great tea selection
Popular for
- Popular for breakfast
- Popular for lunch
- Popular for dinner
- Good for solo dining
Offerings
- Serves coffee
- Has private dining room
- Quick bite
- Serves small plates
- Serves vegetarian dishes
Dining options
- Serves breakfast
- Serves brunch
- Serves lunch
- Serves dinner
- Has catering
- Has counter service
- Serves dessert
- Has seating
Amenities
- Has toilet
Atmosphere
- Casual
- Cosy
Crowd
- Family friendly
- Good for groups
- LGBTQ+ friendly
- Popular with tourists
- Transgender safe space
- Popular with university students
Planning
- Accepts reservations
Payments
- Accepts credit cards
- Accepts debit cards
- Accepts NFC mobile payments
- Credit cards
Children
- Good for kids
- High chairs available
- Has kids' menu
Parking
- Free of charge street parking
- Free parking lot
- Plenty of parking

Alex Chan

Apr 23,2025

Located on Front Street with plenty of street and a large parking lot at the back of the restaurant.There is a large menu to select from and indulged with the steak & eggs paired with rye toast and sweet potato fries. The steak was cooked perfectly paired with the sunny side eggs and well toasted bread to sop up the yolks with.The coffee was endless and even provided a carafe to satisfy my coffee addiction.The staff here are super friendly and love the decor and vibe.Definitely a must goto if you are in the Niagara region and want to enjoy a nice breakfast.

Aimy

Apr 15,2025

This place is incredible! The menu is extensive and the food was delicious. Highly recommend the lobster grilled cheese, and the lemon ricotta pancakes with blueberry sauce. The ambiance was nice - really enjoyed their music selection playing at the right volume in the background. The waitress was super friendly and attentive. The only complaint would be the cleanliness of the bathroom and sticky floor. Other than that, 100% recommend and will be going back for more!

Brenna Lynch

Mar 27,2025

Had a huge and delicious brunch here on a Sunday afternoon. I had a veggie skillet and added avocado and hollandaise sauce, everything was served hot and cooked very well. My husband had the ribeye steak Benedict, the shaved steak was sooo goood. They have a lot going on on their menu, it was a little overwhelming deciding on a dish, but we’ll just have to come back to try it all!

Jennie Steele

Feb 27,2025

I liked this diner a lot! The interior was bright and colourful, with pictures of classic stars and vintage records adorning the walls. Even the fixtures gave the place a nice retro feel. The place is of a good size, but it wasn't crowded around 2pm on Saturday. The menu is huge, with so many options that you'll be inclined to come back to try something new. This visit we tried the breakfast poutine and breakfast lasagna as they sounded unique. Both were delicious and very filling, and were of good value considering the price.Overall, I'm looking forward to visiting again. This is a place you'd want to go whether you're looking for a nice nostalgic joint or hearty hangover food (I won't tell you which reason I came here for).

Southern Peligro

Feb 18,2025

Amazing breakfast place with a HUGE menu. The coffee and food were excellent and the service super friendly. Has an 50s theme inside with the decor, retro chairs and tables. The prices are fair and the service was fast. If you are in the area, be sure to drop by, you won't be disappointed!

Adrienne Keller

Feb 15,2025

This place is fabulous! The menu has a wide variety of choices and I've never had a dish I didn't thoroughly enjoy. The staff members are incredibly kind, thoughtful and caring. We've been treated like family every single time we've come in. I would recommend Cosmo's to anyone and everyone!

Dan Lessard

Jan 28,2025

Love this place. Great menu selection. Great customer service and funky retro diner atmosphere. Prices are very reasonable. Check them out!!

Giulia Forsythe

Jan 23,2025

My friend and I come to Cosmo's all the time and we love it!We usually get the 'YOU ARE FABULOUS' (two eggs, bacon, home fries and toast). Eggs and bacon are always made exactly to order (soft poached, crispy bacon, thank you very much.)The service is impeccable! Friendly, efficient, and attentive - even when a surprise walk-in group of 30 hockey players pops by, my food arrives quickly, hot, and delicious. I love that the coffee comes with a carafe and my cup is always full.The music and décor is fifties and fun. Amenities are clean. Prices are very reasonable. Highly recommend.