Losheim am See is a municipality in the district Merzig-Wadern, in Saarland, Germany. It is situated on the southern ridge of the Hunsrück, approximately 10 kilometers northeast of Merzig, and 35 kilometers northwest of Saarbrücken. In 1974 a reservoir was created in the north of Losheim that has become a popular spot for recreational activities such as hiking and swimming.

Losheim am See is twinned with the following municipalities:

• Capannori, Italy
• Lacroix-Saint-Ouen, France
• Copargo, Benin
• Bokungu, Democratic Republic of the Congo
• Mount Gilead, North Carolina, United States

The municipality is composed of 12 villages: Bachem, Bergen, Britten, Hausbach, Losheim, Mitlosheim, Niederlosheim, Rimlingen, Rissenthal, Scheiden, Wahlen and Waldhölzbach.

Since the municipal election of 25 May 2014, the municipal council is composed as follows:

• CDU - 14 seats (43.1%)
• SPD - 12 seats (34.7%)
• Linke - 1 seats (4.7%) [in SPD Group]
• FL / BD - 4 seats (11.8%)
• GAL - 2 seats (5.8%)

• 1972–1990: Raimund Jakobs (CDU)
• 1990–1995: Reinhard Reis (CDU)
• 1995–2019: Lothar Christ (SPD)
• 2019–incumbent: Helmut Harth (independent)

• Lake Losheim (31 ha)
• Museum railway Merzig-Bueschfelder railway (to Merzig) and railway museum
• Eight certified premium hiking trails certified by the Deutsche Wanderinstitut e. V.
• Parish Church of St. Peter and Paul (Losheim am See)
• State-recognized resorts: Losheim, Britten, Scheiden, Waldhölzbach and Mitlosheim