State Road 10, also known as Atlantic Boulevard, is a major east–west state highway in the U.S. state of Florida. Mostly unsigned in favor of U.S. Highway 90, it runs from the Alabama state line to Atlantic Beach. The only sections that are not signed as US 90 are north of Pensacola, where US 90 uses SR 10A and SR 10 is signed as U.S. Highway 90 Alternate, and east of south Jacksonville, where US 90 uses unsigned SR 212.

U.S. Route 90 (US 90) in the state of Florida is the northernmost east–west United States Numbered Highway in the state. US 90 passes through the county seats of all 15 counties on its course in Florida, and it is also the road upon which many of the county courthouses are located. It is never more than six miles (9.7 km) from Interstate 10 (I-10) throughout the state. It runs as a two-lane highway through most of the sparsely populated inland areas of the Florida Panhandle, widening to four lanes through and near several towns. The speed limit is 55 mph (89 km/h) for all rural points west of Monticello, and it is 60 mph (97 km/h) on all rural points from where it enters Madison County as far as Glen St. Mary.