About
In-N-Out Burger is a popular fast-food restaurant chain with locations throughout the western United States, including one at 4310 Ontario Mills Pkwy in Ontario, California. The restaurant is known for its simple menu of burgers, fries, and shakes, and its commitment to using high-quality, fresh ingredients.
Restaurant Features
Facilities & Amenities
Restroom
Kid Friendly
Kid High Chair
Wheelchair Access
Parking
- Free Parking Lot
Accepted Payments
- Credit Card
- Apple Pay
- Google Pay
Must Try Dishes
When visiting In-N-Out Burger in Ontario, California, be sure to try their classic Double-Double—a mouthwatering combo of two juicy 100% beef patties, fresh lettuce, tomato, and the signature sauce, all sandwiched between perfectly toasted buns. Don't miss out on their Animal-Style Fries, perfectly golden and topped with melted cheese, grilled onions, and special sauce. And for a refreshing treat, their Neapolitan Shake, blended with real strawberries, vanilla, and chocolate ice cream, is an absolute must-try.
Ratings for In-N-Out Burger
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- Overall Rating
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Reviews for In-N-Out Burger
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IN-N-OUT remains my top choice when it comes to fast-food burger joints. It consistently delivers a winning combination of fresh ingredients and excellent service. What truly sets it apart, however, is the unbeatable value it offers, making it a standout in the fast-food realm. My top recommendation at IN-N-OUT is the 4x4 Animal Style, with the delightful addition of an extra grilled bun and whole grilled onions. This mouthwatering treat not only satisfies the heartiest of appetites but also manages to do so at a price that is unmatched by any other fast-food establishment. The exceptional quality and freshness of their offerings truly make them stand head and shoulders above the competition. For anyone seeking a fast-food experience that marries quality, flavor, and value, IN-N-OUT is the place to be. The 4x4 Animal Style, with its extra grilled bun and whole grilled onions, is a culinary delight that embodies everything great about this beloved burger joint.
Placed a large take out order and not only was the food prepared on time but the staff very well packed the food and drinks. I was amazed and the food was well received and consumed by my hungry team. ????????????⭐️⭐️⭐️⭐️⭐️
Just still the best hamburger in the world. Customer service is always great and food is always great.
Menu / Photos








Business Hours
| Sunday: | 10:30 AM - 1:00 AM |
| Monday: | 10:30 AM - 1:00 AM |
| Tuesday: | 10:30 AM - 1:00 AM |
| Wednesday: | 10:30 AM - 1:00 AM |
| Thursday: | 10:30 AM - 1:00 AM |
| Friday: | 10:30 AM - 1:30 AM |
| Saturday: | 10:30 AM - 1:30 AM |
