6A (disambiguation)

6A refers to Six Apart, a software company.

6A may also refer to:


 * 6A (Long Island bus)
 * APP-6A, the NATO standard for military map marking symbols
 * Franklin 6A, an engine powering the 1961 Maule M-4 aircraft
 * Gemini 6A, a 1965 crewed spaceflight
 * HCM-6A, a galaxy found in 2002
 * Keratin 6A
 * Precorrin-6A synthase (deacetylating), an enzyme
 * Precorrin-6A reductase, an enzyme
 * U.S. Route 6A
 * Aviacsa IATA airline designator
 * 6A, the production code for the 1982 Doctor Who serial Black Orchid