By 1978, Sonic was operating 1,000 drive-in restaurants, most of them located in Oklahoma, Texas, Kansas, and Arkansas. Midwest City, Oklahoma, earned the distinction of hosting the 1,000th location.

SONIC's Ice Cream Cookie Sandwiches are available now in two varieties at participating drive-ins for a limited time for $1.49* after 8 p.m. and $1.99 throughout the day.

SONIC Releases Festive Socks and Other Prized Items Just in Time for the Holidays Custom ice machine, sparkling roller skates and more all part of latest merchandise drop from America’s Drive-In ...

Now, Sonic Drive-In, which is headquartered in Oklahoma City but has locations in 47 states, is stepping up to the plate with its trio of barbecue-inspired menu items: its pulled-pork BBQ ...