Kirchleerau is a municipality in the district of Zofingen in the canton of Aargau in Switzerland.

The first documented mention of Lerowe is for the year 1248, the name Kylchleren appeared for the first time in 1306 in the Habsburg Urbar.

The name comes from the Old High German lewirouwo, which means "by the land of the graves near the water".

Kirchleerau now belonged to the subject territory of the city of Bern, the so-called Bernese Aargau.

From the 15th century on, the village was part of the Lordship of Rued, a judicial district within the Office of Lenzburg.

After various noble families from the surrounding area had been in possession of the manor, it was acquired in 1520 by the Lords of May, who originally came from Italy.

In March 1798, the French invaded Switzerland, deprived the "Gracious Lords" of Bern of their power and proclaimed the Helvetic Republic.

Of the rest of the land, 0.37 km2 (0.14 sq mi) or 8.5% is settled (buildings or roads).

The blazon of the municipal coat of arms is Azure a Church Argent windowed and doored Sable and roofed Gules on a Base Vert.

[8] The age distribution, as of 2008[update], in Kirchleerau is; 64 children or 8.6% of the population are between 0 and 9 years old and 74 teenagers or 9.9% are between 10 and 19.

[10] About 63% 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] From the 2000 census[update], 126 or 18.0% were Roman Catholic, while 492 or 70.2% belonged to the Swiss Reformed Church.