Alachua

Alachua may refer to:
 * Alachua County, Florida, United States
 * Alachua, Florida, a city in Alachua County, Florida
 * Alachua culture, the archaeological designation of the Native American culture in north-central Florida, c. AD 700 to 1700
 * Alachua Formation, a geological formation in Florida
 * Alachua, a former genus of wasps in the family Eulophidae, presently a junior synonym of Horismenus