MIAMI — Black drivers in Florida were stopped and given tickets for not wearing seatbelts nearly twice as often as whites who drove on the state’s roads in 2014, according to a report by the American Civil Liberties Union released Wednesday.

In some parts of Florida, the disparity was much greater. Sheriff’s deputies in Palm Beach County and Orange County, home to Orlando, were about three times as likely in 2014 to issue tickets to black drivers for not strapping on seatbelts. And in 2011 in Escambia County, in Florida’s panhandle, black drivers were four times as likely as whites to be stopped and cited for failure to wear a seatbelt.

Florida has long grappled with accusations of racial profiling by law enforcement agencies, and the A.C.L.U.’s report is likely to raise new questions about police procedure and training regarding traffic violations. A number of police departments across the country have been accused of racial bias in carrying out traffic stops, a situation that drew national attention in Ferguson, Mo.

“The overticketing of any community in ways that aren’t justified by regular police behavior raises red flags and can cause serious harms,” said Nusrat Choudhury, a lawyer with the A.C.L.U.’s racial justice program and an author of the report. “Communities feel stigmatized not because of what they have done but who they are. And it burdens people with fines that can be hard to pay.”