Centre of Zwammerdam
The town centre (dark green) and the statistical district (light green) of Zwammerdam in the municipality of Alphen aan den Rijn.
|Municipality||Alphen aan den Rijn|
|Time zone||CET (UTC+1)|
|• Summer (DST)||CEST (UTC+2)|
In 2001, the town of Zwammerdam had 1709 inhabitants. The built-up area of the town was 62 km², and contained 484 residences. The statistical area "Zwammerdam", which also can include the surrounding countryside, has a population of around 1810.
- Statistics Netherlands (CBS), Bevolkingskernen in Nederland 2001 . (Statistics are for the continuous built-up area).
- Statistics Netherlands (CBS), Gemeente Op Maat 2004: Alphen aan den Rijn .
- Ad van der Meer and Onno Boonstra, "Repertorium van Nederlandse gemeenten", KNAW, 2006. 
- J. Kuyper, Gemeente Atlas van Nederland, 1865-1870, "Zwammerdam". Map of the former municipality in 1868.
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