Langelsheim is a town in the district of Goslar in Lower Saxony, Germany.

The municipality is situated between the river Innerste and its tributary the river Grane, on the northern edge of the Harz mountain range and the Harz National Park, located about 8 km (5.0 mi) northwest of Goslar.

Langelsheim is divided into eight Ortschaften with the following population as of 30 June 2020:

• Astfeld (2,097 inhabitants)
• Bredelem (438 inhabitants)
• Hahausen (765 inhabitants)
• Langelsheim (5,067 inhabitants)
• Lautenthal (1,511 inhabitants)
• Lutter am Barenberge (2,296 inhabitants)
• Wallmoden (907 inhabitants)
• Wolfshagen im Harz (2,192 inhabitants)

The place once called Langenizze developed in the 10th century out of a hill fort at the Kahnstein mountain, erected by the Ottonian dynasty. Langelsheim was the site of historic ironworks, first documented in the 13th century, where ore from the Mines of Rammelsberg was smelted. The former municipalities Hahausen, Lutter am Barenberge and Wallmoden are part of Langelsheim since 1 November 2021.

As of 30 June 2020 there were 11,305 inhabitants in Langelsheim.

Year Inhabitants 1821 5,900 1848 6,873 1871 7,290 1885 8,314 1905 9,707 1925 9,643

Year Inhabitants 1933 9,829 1939 10,090 1946 15,427 1950 16,321 1956 15,061

Year Inhabitants 1961 14,243 1968 14,448 1970 14,451 1975 14,929 1980 14,542

Year Inhabitants 1985 13,967 1990 13,892 1995 13,962 2000 13,619 2005 13,068

2006 local elections:

• SPD: 17 seats
• CDU: 9 seats

2016 local elections:

SPD: 12 FDP: 1 WGL: 6 CDU: 7

• Since November 2013: Ingo Henze (SPD)
• 2006-2013: Henning Schrader (SPD)

Langelsheim is twinned with:

• Emmer-Compascuum, Emmen, Netherlands
• Nieuw-Weerdinge, Emmen, Netherlands
• Roswinkel, Emmen, Netherlands

• Henry E. Steinway, (1797-1871), born Heinrich Engelhard Steinweg in Wolfshagen in Harz, was a piano maker
• Jan Assmann, (born 1938), an Egyptologist
• Hans-Werner Bothe, (born 1952), philosopher and neurosurgeon
• Timo Rose, (born 1977), motion picture director and musician