Långsjön

Långsjön ("long lake") may refer to the following lakes in Sweden:


 * Långsjön, Älvsjö, on the border between Stockholm and Huddinge Municipalities
 * Långsjön, Hanveden, on the border between Huddinge and Haninge Municipalities
 * Långsjön (Skälsätra-Tutviken), on the border between Haninge and Tyresö Municipalities
 * Långsjön, Tyresta, in Tyresö Municipality