Schwielowsee (German pronunciation: [ˈʃviːloːˌzeː] ⓘ) is a municipality in the Potsdam-Mittelmark district, in Brandenburg, Germany.

In the east Schwielowsee shares border with the City of Potsdam, in the west with the town of Werder (Havel).

Geltow (together with Potsdam) was first mentioned as Slavic Geliti within the Hevelli lands in a 993 deed by Emperor Otto III, who ceded it to his aunt, abbess Matilda of Quedlinburg.

Since early 20th century it was appraised as a remote residencial area by wealthy urban people.

Caputh and Geltow are connected by one of the busiest ferries of river Havel and by a railway bridge with a sidewalk, The fishermen's village of Ferch on the southwestern end of lake Schwielowsee kept its rural character into the late 20th century.