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

[3] The earliest evidence of a settlement is a High Middle Ages chapel with associated Alamanni graves.

The village has had a tavern since the 13th century, which provided a stopping point for traffic over the Bözberg and another source of income.

[3] Effingen has an area, as of 2006[update], of 6.85 square kilometers (2.64 sq mi).

46.0% of the total land area is heavily forested and 1.2% is covered with orchards or small clusters of trees.

[4] The municipality is located in the Brugg district on the western flank of the Bözberg.

It consists of the linear village of Effingen and the hamlet of Chästel as well as scattered individual farm houses.

Most of the population (as of 2000[update]) speaks German (93.0%), with Albanian being second most common ( 1.4%) and English being third ( 0.9%).

[9] The age distribution, as of 2008[update], in Effingen is; 44 children or 7.2% of the population are between 0 and 9 years old and 91 teenagers or 14.9% are between 10 and 19.

[11] About 66.4% 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).

[9] From the 2000 census[update], 170 or 26.9% were Roman Catholic, while 353 or 55.9% belonged to the Swiss Reformed Church.

Of the rest of the population, there was 1 individual who belonged to the Christian Catholic faith.