|Intercommunality||Région d'Ardres et de la Vallée de la Hem|
|• Mayor (2001–2008)||Léon Leclercq|
|Area1||18.14 km2 (7.00 sq mi)|
|• Density||69/km2 (180/sq mi)|
|INSEE/Postal code||62827 / 62890|
|Elevation||22–174 m (72–571 ft)
(avg. 39 m or 128 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.
Tournehem-sur-la-Hem is located 10 miles (16 km) northwest of Saint-Omer, at the D217 and D218 road junction, on the banks of the river Hem.
|From the year 1962 on: No double counting—residents of multiple communes (e.g. students and military personnel) are counted only once.|
Places of interest
- The church of Saint Médard, dating from the fifteenth century.
- The ruins of the 12th-century château which was destroyed in 1542.
- The tower of a 15th-century windmill.
- The eighteenth-century château at Guémy.
- The church of Notre-Dame at Guémy, dating from the eighteenth century.
- The ruins of the 13th-century chapel of Saint Louis at Guémy.
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