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

Sins has an area, as of 2009[update], of 20.3 square kilometers (7.8 sq mi).

[3] The blazon of the municipal coat of arms is Argent three Roses Gules barbed seeded slipped and leaved proper issuant from Coupeaux Vert.

[7] The age distribution, as of 2008[update], in Sins is; 479 children or 12.8% of the population are between 0 and 9 years old and 536 teenagers or 14.3% are between 10 and 19.

[7] In the 2007 federal election the most popular party was the SVP which received 33.9% of the vote.

[7] The historical population is given in the following table:[8] The former government house of Meienberg at Stadtplatz 2, the current municipal building (former rectory) at Kirchstrasse 14 and the ruins of Meienberg are all listed as Swiss heritage sites of national significance.

[7] From the 2000 census[update], 2,350 or 71.6% were Roman Catholic, while 415 or 12.6% belonged to the Swiss Reformed Church.

It was open a total of 157 days with average of 7 hours per week during that year.