Inkwil is a municipality in the Oberaargau administrative district in the Canton of Bern in Switzerland .

Inkwil is first mentioned in 1262 as Inchwile.

Inkwil has an area, as of 2009, of 3.36 km2 (1.30 sq mi). Of this area, 1.65 km2 (0.64 sq mi) or 49.1% is used for agricultural purposes, while 1.21 km2 (0.47 sq mi) or 36.0% is forested. Of the rest of the land, 0.44 km2 (0.17 sq mi) or 13.1% is settled (buildings or roads), 0.05 km2 (12 acres) or 1.5% is either rivers or lakes and 0.03 km2 (7.4 acres) or 0.9% is unproductive land.

Of the built up area, housing and buildings made up 7.1% and transportation infrastructure made up 5.7%.