Zuilen is a former municipality in the Dutch province of Utrecht. It existed until 1954, when it split in two parts. The southern part merged with Utrecht and Oud-Zuilen merged with Maarssen. Nowadays, New-Zuilen is a neighbourhood of Utrecht. Maarssen merged with other municipalities to form Stichtse Vecht.
Zuylen castle is open to public since 1952.
- J.E.A.L. Struick, Zuilen. Utrecht, Het Spectrum, 1973. 122 p.
- J. Kuyper, Gemeente Atlas van Nederland, 1865-1870, "Zuilen". Map of the former municipality in 1868.