Liestal District is one of the five districts of the largely German-speaking canton of Basel-Country, Switzerland. The city of Liestal serves as capital of both the district of Liestal and the canton of Basel-Country. It has a population of 62,086 (as of 30 June 2021).

Liestal district has an area, as of 2009, of 85.83 square kilometers (33.14 sq mi). Of this area, 29.07 km2 (11.22 sq mi) or 33.9% is used for agricultural purposes, while 37.08 km2 (14.32 sq mi) or 43.2% is forested. Of the rest of the land, 18.89 km2 (7.29 sq mi) or 22.0% is settled (buildings or roads), 0.68 km2 (0.26 sq mi) or 0.8% is either rivers or lakes and 0.13 km2 (32 acres) or 0.2% is unproductive land.