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%).