Araçoiaba da Serra is a municipality located in the state of São Paulo, Brazil. It is situated within the Metropolitan Region of Sorocaba and covers a total land area of 255.33 km² (98.58 sq mi). The city sits at an elevation of 625 meters above sea level.
The name Araçoiaba originates from the Tupi language, which translates to "hider of the sun." This designation was given by indigenous people due to a specific nearby mountain that obscured the sun during its setting in the region.