Waltenschwil is a municipality in the district of Muri in the canton of Aargau in Switzerland.

Of the rest of the land, 1.03 km2 (0.40 sq mi) or 22.6% is settled (buildings or roads), 0.02 km2 (4.9 acres) or 0.4% is either rivers or lakes.

[3] The blazon of the municipal coat of arms is Azure a Crescent increscent between four Mullets of Five Argent one in dexter and three in sinister in pale.

Most of the population (as of 2000[update]) speaks German (95.7%), with Italian being second most common (0.9%) and Albanian being third (0.7%).

[7] The age distribution, as of 2008[update], in Waltenschwil is; 288 children or 12.1% of the population are between 0 and 9 years old and 335 teenagers or 14.0% are between 10 and 19.

[7] In the 2007 federal election the most popular party was the SVP which received 36% of the vote.

[7] From the 2000 census[update], 1,273 or 62.7% were Roman Catholic, while 478 or 23.6% belonged to the Swiss Reformed Church.