fallen to 28,000 by 1945 and only in 1952 did it once again reach prewar levels. On 1 January 1975, Siegen's population surpassed 100,000 through the amalgamation of Hüttental (38,867 inhabitants in 1974) and Eiserfeld (22,354 inhabitants in 1974), making it a city. With 117,224 inhabitants it also at the same time reached its all-time highest population. At the end of June 2005, according to the North Rhine-Westphalia State Office for Data Processing and Statistics (Landesamt für Datenverarbeitung und Statistik Nordrhein-Westfalen), 105,328 people made Siegen their main abode. Since 1975, the population has fallen by roughly 10% (12,000). The following chart shows population figures for Siegen's municipal area, however big it was at each given time. Up to 1833, most figures are estimates, and thereafter census figures (¹) or official estimates by the statistical office of the time or the town/city administration itself. The given figures indicate from 1843 the "population present in the town" (Ort Anwesende Bevölkerung), from 1925 the "dwelling population" (Wohnbevölkerung), and since 1987 the "Population in the place of main residence" (Bevölkerung am Ort der Hauptwohnung). Before 1843, population figures come from irregular surveying procedures. ¹ Census figure Politics Mayor The current mayor of Siegen is Steffen Mues of the Christian Democratic Union (CDU). The most recent mayoral election was held on 13 September 2020 and the results were as follows: ! colspan=2| Candidate ! Party ! Votes ! % |- | bgcolor=| | align=left| Steffen Mues | align=left| Christian Democratic Union | 22,807 | 57.6 |- | bgcolor=| | align=left| Ingmar Schiltz | align=left| Social Democratic Party | 6,525 | 16.5 |- | bgcolor=| | align=left| Michael Groß | align=left| Alliance 90/The Greens | 5,402 | 13.6 |- | bgcolor=| | align=left| Henning Zoz | align=left| Alternative for Germany | 3,031 | 7.7 |- | bgcolor=| | align=left| Melanie Becker | align=left| The Left | 1,847 | 4.7 |- ! colspan=3| Valid votes ! 39,612 ! 98.6 |- ! colspan=3| Invalid votes ! 555 ! 1.4 |- ! colspan=3| Total ! 40,167 ! 100.0 |- ! colspan=3| Electorate/voter turnout ! 80,568 ! 49.9 |- | colspan=5| Source: City of Siegen |} At the city's helm since the 13th century, there have been several mayors of whom evidence survives. In 1304 and 1305, a council ("consules") was mentioned for the first time. As early as 1224, however, documents mention Burgmänner ("Castle Men") as well as three