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

The earliest evidence of human settlement in Mühlau is the remains of a Roman villa.

In 1878 the hamlets of Schoren and Kestenberg left Merenschwand to join the municipality.

[3] Mühlau has an area, as of 2009[update], of 5.52 square kilometers (2.13 sq mi).

[4] The municipality is located in the Muri district, on a southern ridge of the Wagenrain above the Reuss.

It consists of the linear village of Mühlau and the hamlets of Kestenberg, Schoren and Krähenbühl.

The blazon of the municipal coat of arms is Or a Base-Semi Mill-Wheel Sable and Coupeaux Vert.

[8] The age distribution, as of 2008[update], in Mühlau is; 97 children or 9.8% of the population are between 0 and 9 years old and 146 teenagers or 14.7% are between 10 and 19.

[10] About 55.2% of the total households were owner occupied, or in other words did not pay rent (though they may have a mortgage or a rent-to-own agreement).

[8] In the 2007 federal election the most popular party was the SVP which received 44.6% of the vote.

[8] From the 2000 census[update], 666 or 68.0% were Roman Catholic, while 165 or 16.8% belonged to the Swiss Reformed Church.