Arlesheim District is one of the five districts of the largely German-speaking canton of Basel-Country, Switzerland. Its capital is the town of Arlesheim. It has a population of 157,896 (as of 30 June 2021).

Arlesheim district has an area, as of 2009, of 96.24 square kilometers (37.16 sq mi). Of this area, 27.86 km2 (10.76 sq mi) or 28.9% is used for agricultural purposes, while 27.82 km2 (10.74 sq mi) or 28.9% is forested. Of the rest of the land, 39.17 km2 (15.12 sq mi) or 40.7% is settled (buildings or roads), 1.17 km2 (0.45 sq mi) or 1.2% is either rivers or lakes and 0.19 km2 (0.073 sq mi) or 0.2% is unproductive land.