Tienen
| Tienen | |
|---|---|
| City and municipality | |
| Collage of Tienen | |
| Location of Tienen | |
| Location in Belgium
 Tienen in the Province of Flemish Brabant | |
| Coordinates: 50°48′N 04°56′E / 50.800°N 4.933°E | |
| Country | Belgium | 
| Community | Flemish Community | 
| Region | Flemish Region | 
| Province | Flemish Brabant | 
| Arrondissement | Leuven | 
| Government | |
| • Mayor | Katrien Partyka (CD&V) | 
| • Governing party/ies | CD&V, Open VLD, N-VA, Groen | 
| Area | |
|  • Total | 72.77 km2 (28.10 sq mi) | 
| Population  (2024-01-01) | |
|  • Total | 36,581 | 
| • Density | 500/km2 (1,300/sq mi) | 
| Postal codes | 3300 | 
| NIS code | 24107 | 
| Area codes | 016 | 
| Website | www.tienen.be | 
Tienen (Dutch pronunciation: [ˈtinə(n)] ⓘ; French: Tirlemont [tiʁləmɔ̃]) is a city and municipality in the province of Flemish Brabant, in Flanders, Belgium. The municipality comprises Tienen itself and the towns of Bost, Goetsenhoven, Hakendover, Kumtich, Oorbeek, Oplinter, Sint-Margriete-Houtem and Vissenaken.
On 1 January 2017, Tienen had a total population of 34,365. The total area is 71.77 km2 (27.71 sq mi), which gives a population density of 444 inhabitants per square kilometre (1,150/sq mi).