MTA
MTA may refer to:
- Metropolitan transportation authority
- Eastern United States
- Maryland Transit Administration (Baltimore and DC area)
- Metropolitan Transit Authority (Boston), now the Massachusetts Bay Transportation Authority (MBTA)
- Manchester Transit Authority, New Hampshire
- Metropolitan Transportation Authority (New York) Note that the New York City Transit Authority, a part of the Metropolitan Transportation Authority of New York, is sometimes mistakenly referred to as the Metropolitan Transit Authority
- Erie Metropolitan Transit Authority (Erie, Pennsylvania)
- Midwestern United States
- Southwestern United States
- Metropolitan Transit Authority of Harris County, Texas (note that Houstonians refer to the transit authority as METRO, not MTA)
- Southeastern United States
- Metropolitan Transit Authority of Miami Dade County, Florida; now known as Miami-Dade Transit
- Metropolitan Transit Authority of Nashville/Metropolitan Davidson County, Tennessee
- Pacific-Western United States
- Eastern United States
- Municipal Transportation Agency, San Francisco, California
- Massachusetts Turnpike Authority, Massachusetts
- The MTA Song, a folk song about Boston's MTA
- Maccabi Tel Aviv, an Israeli sports club best known for its basketball and football (soccer) teams
- Maccabi Tel Aviv (basketball), Maccabi Tel Aviv's basketball team
- Maccabi Tel Aviv FC, Maccabi Tel Aviv's football (soccer) team
- Hungarian Academy of Sciences (Magyar Tudományos Akadémia), a scientific academy created to further the development of the sciences and the arts in Hungary
- Mail transfer agent, the software agent that transfers electronic mail
- Mormon Transhumanist Association
- Mid-Term Adjustment, a change in an insurance policy
- Mount Allison University, a university in Sackville, New Brunswick, Canada
- Multi Theft Auto, a mod for computer games in the PC game series Grand Theft Auto
- Muslim TV Ahmadiyya, a satellite television station for Ahmadiyya Muslims