Leimbach (German: [ˈlaɪmbax] ⓘ) is a municipality in the district of Kulm in the canton of Aargau in Switzerland.

[3] During the Middle Ages the rights to collect tithes was divided between the Lords of Reinach, Hallwyl, Heidegg, Rupperswil, Büttikon, Falkenstein, Liebegg, and the Monastery at Beromünster.

In the 18th and 19th Centuries the main sources of income were small scale cotton and tobacco production.

Of the rest of the land, 0.18 square kilometers (0.069 sq mi) or 15.7% is settled (buildings or roads).

The blazon of the municipal coat of arms is Gules a Bend Sinister wavy Argent and in chief dexter a Mullet of the same.

[8] The age distribution, as of 2008[update], in Leimbach is; 46 children or 10.7% of the population are between 0 and 9 years old and 48 teenagers or 11.2% are between 10 and 19.

[10] About 77% 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).

[12] The historical population is given in the following table:[3] The Straw-thatched house (German: Strohdachhaus) in Seeberg is listed as a Swiss heritage site of national significance.

[8] From the 2000 census[update], 78 or 19.1% were Roman Catholic, while 272 or 66.5% belonged to the Swiss Reformed Church.