Regional Transit Authority may refer to:
Central Puget Sound Regional Transit Authority Greater Cleveland Regional Transit Authority Greater Dayton Regional Transit Authority New Orleans Regional Transit Authority Regional Transit Authority of Southeast Michigan Regional Transportation Agency of Central Maryland Southwest Ohio Regional Transit Authority
One of 15 Regional Transit Authorities in Massachusetts, including: Berkshire Regional Transit Authority Cape Cod Regional Transit Authority Franklin Regional Transit Authority Montachusett Regional Transit Authority (MART) Pioneer Valley Transit Authority Worcester Regional Transit Authority
See also Regional Transportation Authority (disambiguation)