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Centre historique de Conflans-Sainte-Honorine.Yvelines.France.jpg
Location (in red) within Paris inner and outer suburbs
Location (in red) within Paris inner and outer suburbs
Coordinates: 48°59′57″N 2°05′54″E / 48.9992°N 2.0983°E / 48.9992; 2.0983Coordinates: 48°59′57″N 2°05′54″E / 48.9992°N 2.0983°E / 48.9992; 2.0983
Country France
Region Île-de-France
Department Yvelines
Arrondissement Saint-Germain-en-Laye
Canton Conflans-Sainte-Honorine
 • Mayor (2014–2020) Laurent Brosse
Area1 9.9 km2 (3.8 sq mi)
Population (2006)2 34,305
 • Density 3,500/km2 (9,000/sq mi)
INSEE/Postal code 78172 / 78700
Elevation 17–60 m (56–197 ft)
(avg. 25 m or 82 ft)

1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km² (0.386 sq mi or 247 acres) and river estuaries.

2 Population without double counting: residents of multiple communes (e.g., students and military personnel) only counted once.

Conflans-Sainte-Honorine is a commune in the Yvelines department in the Île-de-France region in north-central France. It is located in the north-western suburbs of Paris, 24.2 km (15.0 mi) from the center of Paris.

Confluence of Oise (left) and Seine (right) rivers

The commune was originally named for its geographic position at the confluence of the Seine and Oise rivers. The village was given the addition "Sainte Honorine" in the 13th century after the female Saint Honorina, whose relics had been stored there since 876.

Partly on account of its strategic position, Conflans-Sainte-Honorine is considered the capital of the French inland waterways, and the right bank of the River Seine is still lined with barges (although these are now used mainly as houseboats). Every year in June, the town celebrates the "Pardon national de la batellerie" in remembrance of its former importance to inland shipping.


Conflans-Sainte-Honorine is served by Conflans-Sainte-Honorine station on the Transilien Paris – Saint-Lazare regional rail line.

It is also served by Conflans – Fin d'Oise station which is an interchange station on Paris RER line A and on the Transilien Paris – Saint-Lazare suburban rail line.


  • Samuel Coco-Viloin, athlete
  • Michel Rocard, former French prime minister (1988-1991), Socialist party, former mayor of Conflans (1977-1994)
  • Jean-Paul Huchon, president of the regional council for Île-de-France,Socialist party, former mayor of Conflans (1994-2001)

Twin towns[edit]

See also[edit]


External links[edit]