Fast Food Restaurant – illustrative photo

Fast Food RestaurantDiamond Bar, CA

In-N-Out Burger – Diamond Bar, CA

Open now · closes 1:00 AM

Directions

Illustrative photo

Opening hours

Open now · closes 1:00 AM

Weekly opening hours of In-N-Out Burger
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
Sunday	10:30 AM – 1:00 AM

Local time in Diamond Bar: 7:55 PM (PDT). Holiday hours may differ.

Location & directions

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21133 Golden Springs Drive
Diamond Bar, CA 91765

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About In-N-Out Burger

Located at 21133 Golden Springs Drive in Diamond Bar, California, In-N-Out Burger is a fast food restaurant. It is one of 55 places to eat and drink we list in Diamond Bar.

In-N-Out Burger is open 7 days a week, usually 10:30 AM – 1:00 AM. It stays open late, until 1:00 AM on most nights.

Service options include takeout, drive-through, and outdoor seating. On the menu: burgers.

Quick facts

Category: Fast Food Restaurant · Burger
Address: 21133 Golden Springs Drive, Diamond Bar, CA 91765
Hours: Open 7 days a week, usually 10:30 AM – 1:00 AM
Listing updated: September 2026 · Suggest an edit

Popular times (estimated)

6AM

9AM

12PM

3PM

6PM

9PM

Estimated from typical visit patterns for fast food restaurants and this venue’s opening hours – not live data.

Features & amenities

Service options

Takeout
Drive-through
Outdoor seating

Reviews

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Frequently asked questions

What are In-N-Out Burger's opening hours?

Open 7 days a week, usually 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; Sunday: 10:30 AM – 1:00 AM.

Is In-N-Out Burger open on Sunday?

Yes, In-N-Out Burger is open on Sundays: 10:30 AM – 1:00 AM.

Where is In-N-Out Burger located?

In-N-Out Burger is located at 21133 Golden Springs Drive, Diamond Bar, CA 91765.

Does In-N-Out Burger offer delivery or takeout?

Delivery is not listed for In-N-Out Burger, and takeout is available. Listed service options: takeout, drive-through, and outdoor seating.