Cayeux-sur-Mer (French pronunciation: [kajø syʁ mɛʁ], literally Cayeux on Sea; Picard: Tchéyeu-su-Mér) is a resort town in the Somme department in Hauts-de-France in northern France. The town is part of the Baie de Somme - Picardie maritime regional natural park project.
Cayeux-sur-Mer | |
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Commune | |
Marechal Foch Street Cayeux-sur-Mer | |
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Coat of arms | |
Location of Cayeux-sur-Mer ![]() | |
Cayeux-sur-Mer Cayeux-sur-Mer | |
| Coordinates: 50°10′54″N 1°29′45″E | |
| Country | France |
| Region | Hauts-de-France |
| Department | Somme |
| Arrondissement | Abbeville |
| Canton | Friville-Escarbotin |
| Intercommunality | CA Baie de Somme |
| Government | |
| • Mayor (2020–2026) | Jean-Paul Lecomte[1] |
| Area 1 | 26.29 km2 (10.15 sq mi) |
| Population | 2,445 |
| • Density | 93/km2 (240/sq mi) |
| Time zone | UTC+01:00 (CET) |
| • Summer (DST) | UTC+02:00 (CEST) |
| INSEE/Postal code | 80182 /80410 |
| Elevation | 0–15 m (0–49 ft) (avg. 2 m or 6.6 ft) |
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |

Its inhabitants are called the Cayolais.
The commune is a seaside town, situated on the D102 road, some 14 miles (23 km) northwest of Abbeville.
| Year | Pop. | ±% p.a. |
|---|---|---|
| 1968 | 2,750 | — |
| 1975 | 2,862 | +0.57% |
| 1982 | 2,649 | −1.10% |
| 1990 | 2,856 | +0.94% |
| 1999 | 2,781 | −0.30% |
| 2007 | 2,781 | +0.00% |
| 2012 | 2,635 | −1.07% |
| 2017 | 2,477 | −1.23% |
| Source: INSEE[3] | ||
| General | |
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