Osta or OSTA may refer to:
People Benedict John Osta (1931–2014), Indian Roman Catholic archbishop Clairemarie Osta, French ballet dancer Eduardo Osta (born 1959), Spanish tennis player Jean d'Osta (1909–1993) Belgian writer, journalist, and humorist Pavlina Osta (born 1997), American radio personality
Acronym Ontario Student Trustees' Association Optical Storage Technology Association
See also ÖStA (Österreichisches Staatsarchiv, National Archives of Austria)