Our History


Welcome to the new Southside Diner at Southside Market Place Shopping Center in Baltimore’s Locust Point neighborhood!

Formerly Rallo’s, our South Baltimore roots reach back nearly 100 years when Vince Rallo’s father first opened the diner near Fort McHenry. In 1962, Rallo’s moved to the corner of Fort Avenue and Lawrence Street, where it became a neighborhood landmark.  Over the course of 40 years, a loyal following of city council members, construction workers and families alike was created.

After Mr. Rallo died in 2011, the diner changed hands and the name was changed to Big Matty’s Diner. In 2012, brothers and Baltimore natives Nick and Steve Karvounis bought the diner and began to carry on the legacy left behind by Rallo’s—serving delicious, home cooked food in a clean, unpretentious, family friendly atmosphere.

This summer, we’re proud to introduce you to the new Southside Diner, just a stone’s throw from the original site, in the Southside Marketplace Shopping Center. Everything you’ve come to know and love—including our longtime staff—will be there waiting to greet you with open arms.

Our “All Day Breakfasts”, featuring our house special omelettes and breakfast platters, lunch sandwiches, subs, salads and paninis, kids choices, and NOW, our dinner menu with steaks, chops and more, will ensure that there’s something for everyone at your table!

Stop in and say hello– and before you know it– we’ll be holding your spot at the counter, too.

Online ordering is coming soon!


Southside Diner Special

Best Baltimore Breakfast Served All Day!

Southside Diner Special

Ask us about our delicious
Daily Specials

Southside Diner Special

Custom Catering Available for your next meeting or party

Southside Diner Special

Take 10% off your bill when visiting Baltimore’s Fort McHenry

(same day)


At Southside Diner in Baltimore, MD, we take pride in providing every customer with home cooked meals and excellent customer service in a relaxed, comfortable atmosphere.

Let us bring this experience to your next meeting, get together, or party through a customized catering menu designed just for you.

Whether your party is for 10 or 100, we can accommodate your budget!

Call Nick today at 410-727-7067 to create the perfect catering menu for your next lunch meeting, party or special occasion.

Places to Visit

Fort McHenry
2400 E. Fort Avenue
Baltimore, MD 21230
Find Out More

National Aquarium
501 E. Pratt Street
Baltimore, MD 21202
Find Out More

Maryland Science Center
601 Light Street
Baltimore, MD 21230
Find Out More

Babe Ruth Birth Place Museum & Sports Legends Museum
216 Emory St
Baltimore, MD 21230
Find Out More

Baltimore Civil War Museum at President Street
601 S President St
Baltimore, MD 21202
Find Out More

Baltimore Museum of Industry
1415 Key Highway
Baltimore, MD 21230
Find Out More

B&O Railroad Museum
901 W. Pratt St
Baltimore, MD 21223
Find Out More

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Southside Diner
893 Fort Avenue
Baltimore, MD 21230
In the Southside Market Place
Shopping Center

7 days a week
Mon-Sat: 7am – 8:30pm
Sundays 7am – 3pm