Arcella is a genus of testate amoebae in the Arcellinidan order.
It may also refer to: Arcella hemisphaerica, an amoeboid species Fabio Arcella (died 1560), Italian Roman Catholic prelate Arcella (Padua), a district in Padua, Italy Sanctuary of Arcella, Padua, a Roman Catholic church located in the district San Nicola Arcella, a town and comune in Cosenza, Calabria, Italy