Margency (French pronunciation: [maʁʒɑ̃si] ⓘ) is a commune in the Val-d'Oise department and Île-de-France region of France.
The composer Victor Serventi died in Margency on 16 March 2000.
| Year | Pop. | ±% p.a. |
|---|---|---|
| 1968 | 860 | — |
| 1975 | 1,468 | +7.94% |
| 1982 | 2,451 | +7.60% |
| 1990 | 2,745 | +1.43% |
| 1999 | 2,587 | −0.66% |
| 2007 | 2,857 | +1.25% |
| 2012 | 2,893 | +0.25% |
| 2017 | 2,887 | −0.04% |
| Source: INSEE[3] | ||