Sarmenstorf is a municipality in the district of Bremgarten in the canton of Aargau in Switzerland.

The earliest settlement in the municipality built the neolithic burial mound at Zigiholz.

The next known settlement was a Roman era villa with a portico and bath house from the 1st Century AD.

villa with corner projections and bathing from the late 1st Century AD at Murimooshau.

The bailiwick in der Gassen (which included Sarmenstorf) was held by the Freiherren of Küssnacht, Eschenz and Hermetschwil Abbey until 1514, when it transferred to Melchior zur Gilgen.

Of the rest of the land, 11.5% is settled (buildings or roads) and the remainder (0.2%) is non-productive (rivers or lakes).

The blazon of the municipal coat of arms is Gules two Pilgrim Stocks Or in saltire.

[4] The age distribution, as of 2008[update], in Sarmenstorf is; 269 children or 11.4% of the population are between 0 and 9 years old and 331 teenagers or 14.0% are between 10 and 19.

[9] The historical population is given in the following table:[3] The Zigiholz, a neolithic tumulus, is listed as a Swiss heritage site of national significance.

[4] From the 2000 census[update], 1,393 or 64.9% were Roman Catholic, while 428 or 19.9% belonged to the Swiss Reformed Church.