Merzig (German: [ˈmɛʁtsɪç] ⓘ, French: Mercy, Moselle Franconian: Meerzisch/Miërzësch) is a town in Saarland, Germany.

It is the capital of the district Merzig-Wadern, with about 30,000 inhabitants in 17 municipalities on 108 km².

Roman Empire 369–5th century Franks 5th century Francia->Carolingian Empire 481–888 Bishopric->Prince-Bishopric->Electorate of Trier 888–1333 Duchy of Lorraine/ Electorate of Trier 1333–1766 (condominium) Kingdom of France/ Electorate of Trier 1766–1778 (condominium) Electorate of Trier 1778–1794 French Republic->French Empire 1794–1815 Kingdom of Prussia 1815–1871 German Empire 1871–1918 Territory of the Saar Basin 1920–1935 Nazi Germany 1935–1945 Saar Protectorate 1947–1956 West Germany 1957–1990 Germany 1990–present In addition to the above, the city was known under French rule as Mercy.

Merzig was created in 1974 as part of the territorial reform in Saarland.

The population of the present town, including all outlying districts (as of June 30, 2011): Merzig is the birthplace of footballer Kevin Trapp and tennis player Benjamin Becker.