Aigle has an area, as of 2009[update], of 434.99 square kilometers (167.95 sq mi).

[2] Most of the population (as of 2000[update]) 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%).

[4] The age distribution, as of 2009[update], in Aigle is; 3,871 children or 10.0% of the population are between 0 and 9 years old and 5,803 teenagers or 14.9% are between 10 and 19.

[3] The following municipalities are located in the district: The historical population is given in the following chart:[7] In the 2007 federal election the most popular party was the SVP which received 27.7% of the vote.

In the federal election, a total of 8,604 votes were cast, and the voter turnout was 42.2%.

[8] From the 2000 census[update], 14,234 or 40.4% belonged to the Swiss Reformed Church, while 11,386 or 32.3% were Roman Catholic.

In the Vaud cantonal school system, two years of non-obligatory pre-school are provided by the political districts.

[9] During the school year, the district provided pre-school care for a total of 205 children.