Macha is a goddess of ancient Ireland, associated with war, horses, sovereignty, and the sites of Armagh and Eamhain Mhacha in County Armagh, which are named after her. A number of figures called Macha appear in Irish mythology, legend and historical tradition, all believed to derive from the same deity. The name is presumably derived from Proto-Celtic *makaja denoting "a plain" (genitive *makajas "of the plain").

Karel Hynek Mácha (16 November 1810 – 6 November 1836) was a Czech romantic poet.