At O’Sullivan’s, they fire up the grill for about 400 pounds of hamburger every week. These burgers are big. Each belly-busting beast is a half-pound of fresh-ground sirloin. To cook a burger this thick and juicy takes patience, and about 20 minutes.

R.F. O'Sullivan & Son
Reviewed from Google

4.5 out of 5 stars

Esteban Morillo
Esteban Morillo

5 out of 5 stars

posted 1 month ago

Great burger. Heard this place is one of the best for burgers in Boston and it didn’t disappoint. They have around 30 different burgers in their menu. Black Jack burger had great flavor and juicy patty. Just be aware that it is a bit spicy.

Jesse Walker
Jesse Walker

5 out of 5 stars

posted 2 months ago

Great big burger at a great price. They have their own root beer too! It’s busy even midweek so go with a little extra time to linger over a great meal.

Ricky Tong
Ricky Tong

5 out of 5 stars

posted 1 month ago

I love this place! One of my favourite burger bar in town.

Michele
Michele

5 out of 5 stars

posted 7 months ago

Love how cozy it is. The wait staff is very nice. Steak tips are the best hands down. I def recommend this place to everyone. Don't forget to get a rootbeer float So good.Reasonable prices.

Jared DeLuca
Jared DeLuca

5 out of 5 stars

posted 1 month ago

Got the ragin' Cajun burger and it was phenomenal! The onion rings were great too. And I'm not usually a fan of the thick cut steak fries, but these were cooked to the perfect amount of crispy. Service was great too, very attentive, friendly, and patient.

Address

Address:

282 Beacon St, Somerville, MA 02143, USA

Telephone:

Opening Hours

Monday

11:00 am – 11:00 pm

Tuesday

11:00 am – 11:00 pm

Wednesday

11:00 am – 11:00 pm

Thursday

11:00 am – 11:00 pm

Friday

11:00 am – 11:00 pm

Saturday

11:00 am – 11:00 pm

Sunday

11:00 am – 11:00 pm