Olga may refer to:

People and fictional characters

* Olga (name), a given name, including a list of people and fictional characters named Olga or Olha * Michael Algar (born 1962), English singer also known as "Olga"

Places

Russia

* Olga, Russia, an urban-type settlement in Primorsky Krai * Olga Bay, a bay of the Sea of Japan in Primorsky Krai * Olga (river), Primorsky Krai

United States

* Olga, Florida, an unincorporated community and census-designated place * Olga, Kentucky, an unincorporated community * Olga, Missouri, an unincorporated community * Olga, Washington, an unincorporated community * Olga Bay, Alaska, a bay on the south end of Kodiak Island * Olga, a neighborhood of South Pasadena, California

Elsewhere

* Kata Tjuta, Northern Territory, Australia, also known as the Olgas, a group of domed rock formations ** Mount Olga, the tallest of these rock formations * Olga, Greece, a settlement * 304 Olga, a main belt asteroid

Arts and entertainment

* Olga (opera), ''Olga'' (opera), a 2006 Brazilian opera about Olga Benário Prestes * Olga (2004 film), ''Olga'' (2004 film), a 2004 Brazilian biopic of Benário * Olga (2021 film), a Franco-Ukrainian-language Swiss drama * Olga TV, a British independent television production company * On-line Guitar Archive, a former online resource for guitar chords and tablature

Other uses

* OLGA (technology), an oil and gas simulator * Tropical Storm Olga, the name of several tropical cyclones * , a German coaster in service 1927–59 * Olga (horse), an equine recipient of the Dickin Medal * Führerhauptquartier Olga, an unfinished German World War II bunker facility planned for Hitler's use near Orsha, Soviet Union