Niort is to the southwest of the Deux-Sèvres department on the left side of the Sèvre Niortaise river.
The city is the main place to get into the Marais Poitevin, a large area of marshland in western France.

Niort is at about 41 km (25 mi) from Parthenay and about 64 km (40 mi) from Bressuire, the two subprefectures of the department.

The city is also at about 187 km (116 mi) from Bordeaux, 411 km (255 mi) from Paris, 827 km (514 mi) from Marseille and 423 km (263 mi) from Toulouse.

The commune has an area of 68.2 km² (26.3 sq mi).
Its average altitude is 40 m (130 ft); at the city hall, the altitude is 28 m (92 ft).

The commune of Niort is surrounded by the communes:
Niort is to the southwest of the Deux-Sèvres department on the left side of the Sèvre Niortaise river. The city is the main place to get into the Marais Poitevin, a large area of marshland in western France.
Niort is at about 41 km (25 mi) from Parthenay and about 64 km (40 mi) from Bressuire, the two subprefectures of the department.
The city is also at about 187 km (116 mi) from Bordeaux, 411 km (255 mi) from Paris, 827 km (514 mi) from Marseille and 423 km (263 mi) from Toulouse.
The commune has an area of 68.2 km² (26.3 sq mi). Its average altitude is 40 m (130 ft); at the city hall, the altitude is 28 m (92 ft).
The commune of Niort is surrounded by the communes:
Niort