Alphen aan den Rijn

Alphen aan den Rijn
The older former city hall
Location in South Holland
Coordinates: 52°8′N 4°40′E / 52.133°N 4.667°E / 52.133; 4.667
CountryNetherlands
ProvinceSouth Holland
Government
  BodyMunicipal council
  MayorPeter Rehwinkel (PvdA)
Area
  Total
132.50 km2 (51.16 sq mi)
  Land126.23 km2 (48.74 sq mi)
  Water6.27 km2 (2.42 sq mi)
Elevation
2 m (7 ft)
Population
 (January 2021)
  Total
112,587
  Density892/km2 (2,310/sq mi)
DemonymAlphenaar
Time zoneUTC+1 (CET)
  Summer (DST)UTC+2 (CEST)
Postcode
2390–2409, 2445, 2470–2471, 2730–2731, 2770–2771
Area code0172
Websitewww.alphenaandenrijn.nl

Alphen aan den Rijn (Dutch pronunciation: [ˈɑlfə(n) aːn də(n) ˈrɛin] ; English: "Alphen upon Rhine" or "Alphen on the Rhine") is a city and municipality in the western Netherlands, in the province of South Holland. The city is situated on the banks of the river Oude Rijn (Old Rhine), where the river Gouwe branches off. The municipality had a population of 112,587 in 2021, and covers an area of 132.50 km2 (51.16 sq mi) of which 6.27 km2 (2.42 sq mi) is water.

The municipality of Alphen aan den Rijn also includes the communities of Aarlanderveen, Benthuizen, Boskoop, Hazerswoude-Dorp, Hazerswoude-Rijndijk, Koudekerk aan den Rijn en Zwammerdam. The city is located in what is called the 'Green Heart' of the Netherlands, which is a somewhat less densely populated centre area of the Randstad.

The name "Alphen" is probably derived from the name of the Roman fort Albaniana, meaning "settlement at the white water". Its remains still lie underneath the city centre.