Town hall of Troisdorf
|• Mayor||Klaus-Werner Jablonski (since October 2009) (CDU)|
|• Total||62.17 km2 (24.00 sq mi)|
|Elevation||55 m (180 ft)|
|• Density||1,200/km2 (3,100/sq mi)|
|Time zone||CET/CEST (UTC+1/+2)|
|Postal codes||53840, 53842, 53844|
|Dialling codes||02241, 02203, 02246, 0228|
Division of the town
Troisdorf consists of 12 districts (population as of April, 2014):
- Troisdorf-Mitte (16,414 inhabitants)
- Altenrath (2,292 inhabitants)
- Bergheim (5,750 inhabitants)
- Eschmar (3,078 inhabitants)
- Friedrich-Wilhelms-Hütte (7,161 inhabitants)
- Kriegsdorf (3,129 inhabitants)
- Müllekoven (1,793 inhabitants)
- Oberlar (6,100 inhabitants)
- Rotter See (3,918 inhabitants)
- Sieglar (8,668 inhabitants)
- Spich (12,765 inhabitants)
- West (5,367 inhabitants)
- (total 76,435 inhabitants)
Troisdorf became a free city in 1952. In 1969, the urban area expanded with the annexation of the township of Sieglar and the villages of Altenrath and Friedrich-Wilhelms-Hütte (total population in 1969: about 51,000). The first large settlements in this area go back to the 9th and 10th century (Eschmar and Sieglar 832, Bergheim 987). The first churches in this area were built around 700 AD in Bergheim (St. Lambertus).
Troisdorf is home to about 9600 foreign nationals. The two most numerous foreign national groups are Turks (3100) and Greeks (1600). On June 4, 1972, Troisdorf founded the first advisory council for foreign citizens in Germany. In the years following the Peaceful Revolution and German reunification of 1989/1990 many migrants from Russia and other East European countries settled in Troisdorf.
On April, 2014, Troisdorf had a population of 76,435 according to official records. 11% of the population are foreign migrants.
Troisdorf has a predominantly Christian population: Roman Catholics, Protestants, Baptists, Jehovah's Witnesses and other Christian denominations, along with Muslim, Orthodox Christian and Jewish populations of non-indigenous origin. Troisdorf is one of the German cities where its mosque includes a minaret, built for the local Islamic community.
- 1969–1975: Josef Ludwig (CDU)
- 1975–1993: Hans Jaax (SPD)
- 1993–1998: Uwe Göllner (SPD)
- 1998–1999: Walter Bieber (SPD)
Europe's only picture-book museum is located in Troisdorf at the Burg Wissem castle.
- Évry, Île-de-France, France, since 1972
- Genk, Belgium since 1990
- Heidenau, Germany, since 1990
- Redcar and Cleveland, United Kingdom, since 1990
- Kerkyra, Greece, since 1996
- Nantong, China, since 1997
- Mušutište, Serbia since 2001
- Özdere, Turkey since 2004
- John Siberch, pioneering printer and friend of Erasmus
- Tom Buhrow, German news anchor
- Lena Schöneborn, Olympic champion in Modern Pentathlon 2008
- Sabine Lisicki, German professional tennis player
- Rupert Neudeck, founder of the Cap Anamur, a German humanitarian aid organisation
- Paul Schäfer, founder Colonia Dignidad, a German sect in Chile
- Walter Stern, art critic and broadcaster
- "Amtliche Bevölkerungszahlen" (in German). Landesbetrieb Information und Technik NRW. Retrieved 2018-02-24.
- "Willkommen in Troisdorf / Zahlen – Daten – Fakten" (PDF) (in German). Town of Troisdorf. p. 3. Retrieved 25 March 2015.