Trochu /ˈtroʊʃuː/ is a town in central Alberta, Canada that is surrounded by Kneehill County. It is approximately 15 km (9.3 mi) north of Three Hills at the junction of Highway 21 and Highway 585.

The town is named for Armand Trochu, who founded the St. Anne Ranch Trading Company on the present site of the town in 1903. Ranchers and settlers started arriving in the late 1890s.

In the 2021 Census of Population conducted by Statistics Canada, the Town of Trochu had a population of 998 living in 428 of its 469 total private dwellings, a change of -5.7% from its 2016 population of 1,058. With a land area of 2.78 km² (1.07 sq mi), it had a population density of 359.0/km² (929.8/sq mi) in 2021.

In the 2016 Census of Population conducted by Statistics Canada, the Town of Trochu recorded a population of 1,058 living in 421 of its 472 total private dwellings, a -1.3% change from its 2011 population of 1,072. With a land area of 2.78 km² (1.07 sq mi), it had a population density of 380.6/km² (985.7/sq mi) in 2016.

The Town of Trochu's 2012 municipal census counted a population of 1,067, a 4.1% decrease from its 2009 municipal census population of 1,113.

The main industry is agriculture, though the oil and gas industry is bringing more and more revenue into the area.

Trochu is home to an arboretum, which is home to over 1,000 trees and shrubs of over 100 species, as well as various native and non-native flowering plant species, and showy floral displays.

Trochu also has a local museum and has recreational venues including an arena, an outdoor swimming pool, a campground and ball diamonds.