MA-4 may refer to:
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Massachusetts Route 4
Route 4 is an state highway in northeastern Massachusetts. It runs south to north, serving many of Boston's western and northwestern suburbs, from an interchange with Massachusetts Route 2, Route 2 in Lexington, Massachusetts, Lexington northwest ...
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Mercury-Atlas 4
Mercury-Atlas 4 was an uncrewed spaceflight of the Mercury program. It was launched on September 13, 1961, at 14:09 UTC from Launch Complex 14 at Cape Canaveral, Florida. A Crewman Simulator instrument package was aboard. The craft orbited the Ea ...
, a test flight of Project Mercury
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