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

The first traces of human settlement near Niederwil are several scattered neolithic stones axes.

An iron spearhead from the 7th Century was discovered in the municipality, but all details of the discovery have been lost.

Of the rest of the land, 14.1% is settled (buildings or roads) and the remainder (2.5%) is non-productive (rivers or lakes).

[4] The municipality is located in the Bremgarten district on the left bank of the Reuss river.

[4] The age distribution, as of 2008[update], in Niederwil is; 254 children or 10.6% of the population are between 0 and 9 years old and 381 teenagers or 15.9% are between 10 and 19.

[9] About 59.7% 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).

[11] The historical population is given in the following table:[3] The former Cistercian convent of Gnadenthal as well as the Gnadenthalerstrasse are listed as Swiss heritage sites of national significance.

[4] From the 2000 census[update], 1,479 or 59.9% were Roman Catholic, while 662 or 26.8% belonged to the Swiss Reformed Church.