Ontario's casino landscape in 2026 boasts massive resorts blending gaming, hotels, and entertainment. This guide ranks the top 10 biggest by size, slots, tables, and visitor draw, perfect for planning your next trip from Toronto to Niagara.
From OLG-operated giants to private powerhouses, these venues feature thousands of machines and expansive floors. Whether chasing jackpots or shows, our detailed rankings and access tips make navigation easy.
1. Casino Niagara: Niagara Falls Behemoth
Spanning 185,000 sq ft with 1,600+ slots.
- Waterfall views
- Live music venues
- 24/7 poker
"top 10 biggest casino in ontario is most useful when readers can compare options quickly."
2. Fallsview Casino Resort: Epic Scale
Over 200,000 sq ft, 3,500 slots, luxury hotels.
- Theater for stars
- Fine dining
- High-limit salons
3. Casino Woodbine: Toronto's Giant
80,000 sq ft near racetrack, sports betting hub.
- Horse racing integration
- 200+ tables
- VIP lounges
4. OLG Casino Brantford: Expansive Midwest
65,000 sq ft with modern expansions in 2026.
- Slots galore
- Bingo hall
- Proximity to highways
5. Great Canadian Casino Resort Toronto
New 2026 flagship with 150,000 sq ft planned.
- Resort amenities
- E-sports arena
- Rooftop pool
6. Casino Ajax: East GTA Powerhouse
High-traffic spot with 1,200 machines.
- Table games focus
- Events center
- Free parking
7. OLG Slots at Kawartha Downs
Combined gaming-racing venue.
- Live harness racing
- 500+ slots
- Budget-friendly
8. Casino Fort Erie: Border Giant
Near US line, 800 slots.
Near US line, 800 slots.
Near US line, 800 slots.
- Cross-border appeal
- Smoke-free zones
- Daily promos
9. Elements Casino Victoria
Ontario's Pacific-inspired large floor.
- Asian games
- Concerts
- Hotel packages
10. Gateway Casinos Thunder Bay
Northern largest with scenic views.
- Slots and VLTs
- Local cuisine
- Winter events
Frequently Asked Questions
Which is the largest casino in Ontario?
Fallsview Casino Resort leads with over 200,000 sq ft in 2026.
Are Ontario casinos open 24/7?
Most yes, check OLG site for hours.
What ID is required?
19+ with government ID.
Best for slots?
Casino Niagara or Fallsview.
Free parking available?
Yes at most locations.