Aigle District is a district of the canton of Vaud, Switzerland.

Aigle has an area, as of 2009, of 434.99 square kilometers (167.95 sq mi). Of this area, 147.87 km2 (57.09 sq mi) or 34.0% is used for agricultural purposes, while 179.6 km2 (69.3 sq mi) or 41.3% is forested. Of the rest of the land, 30.47 km2 (11.76 sq mi) or 7.0% is settled (buildings or roads) and 77.07 km2 (29.76 sq mi) or 17.7% is unproductive land.

Aigle has a population (as of December 2020) of 46,253.

Most of the population (as of 2000) speaks French (28,451 or 80.7%), with German being second most common (1,268 or 3.6%) and Portuguese being third (884 or 2.5%).