Villnachern is a municipality in the district of Brugg in the canton of Aargau in Switzerland.

Of the rest of the land, 0.72 square kilometers (0.28 sq mi) or 12.5% is settled (buildings or roads), 0.4 square kilometers (0.15 sq mi) or 7.0% is either rivers or lakes and 0.04 km2 (9.9 acres) or 0.7% is unproductive land.

46.9% of the total land area is heavily forested and 2.8% is covered with orchards or small clusters of trees.

[3] The blazon of the municipal coat of arms is Azure a Ploughshare Or between in Chief two Mullets of Five of the same.

[7] The age distribution, as of 2008[update], in Villnachern is; 184 children or 12.4% of the population are between 0 and 9 years old and 166 teenagers or 11.2% are between 10 and 19.

[9] The historical population is given in the following table:[8] The Tithe barn (German: Zehntenhaus) at Vorstadt 2 is listed as a Swiss heritage site of national significance.

[7] From the 2000 census[update], 304 or 24.9% were Roman Catholic, while 684 or 56.0% belonged to the Swiss Reformed Church.