title: Le Mesnil-Saint-Denis
text: # Le Mesnil-Saint-Denis
  
  Le Mesnil-Saint-Denis (French pronunciation: (listen)) is a commune in the Yvelines department in the Île-de-France region in north-central France.
  
  ## Demographics
  
  | Year | Pop. | ±% p.a. |
  | - | - | - |
  | 1793 | 474 | — |
  | 1800 | 529 | +1.58% |
  | 1806 | 450 | −2.66% |
  | 1821 | 491 | +0.58% |
  | 1831 | 519 | +0.56% |
  | 1836 | 503 | −0.62% |
  | 1841 | 489 | −0.56% |
  | 1846 | 534 | +1.78% |
  | 1851 | 505 | −1.11% |
  | 1856 | 445 | −2.50% |
  | 1861 | 504 | +2.52% |
  | 1866 | 491 | −0.52% |
  | 1872 | 498 | +0.24% |
  | 1876 | 518 | +0.99% |
  | 1881 | 518 | +0.00% |
  | 1886 | 536 | +0.69% |
  | 1891 | 553 | +0.63% |
  | 1896 | 657 | +3.51% |
  | Year | Pop. | ±% p.a. |
  | 1901 | 670 | +0.39% |
  | 1906 | 650 | −0.60% |
  | 1911 | 654 | +0.12% |
  | 1921 | 623 | −0.48% |
  | 1926 | 633 | +0.32% |
  | 1931 | 758 | +3.67% |
  | 1936 | 792 | +0.88% |
  | 1946 | 1,046 | +2.82% |
  | 1954 | 1,161 | +1.31% |
  | 1962 | 1,727 | +5.09% |
  | 1968 | 4,061 | +15.32% |
  | 1975 | 5,381 | +4.10% |
  | 1982 | 6,594 | +2.95% |
  | 1990 | 6,528 | −0.13% |
  | 1999 | 6,518 | −0.02% |
  | 2007 | 6,622 | +0.20% |
  | 2012 | 6,593 | −0.09% |
  | 2017 | 6,789 | +0.59% |
  
  Graphs are temporarily unavailable due to technical issues. :
  
  Source: EHESS and INSEE (1968-2017) :
  
  ## Schools
  
  The commune has two public preschools, Maternelle de Champmesnil and Maternelle du Bois du Fay, as well as two public elementary schools, Élémentaire de Champmesnil and Élémentaire du Bois du Fay. It also hosts two junior high schools, the public Collège Philippe de Champaigne and the private Collège privé Saint Thérèse. Collège Philippe de Champaigne also serves residents of La Verrière.
  
  ## Twin towns
  
  * Hankensbüttel, Germany since 1983
  