Birr is a municipality in the Swiss canton of Aargau and the capital of Brugg (district).

His gravesite in Birr is listed as a heritage site of national significance.

In 1771, Johann Heinrich Pestalozzi bought a piece of waste land called Neuhof (New Farm), where he attempted the cultivation of madder.

However, following an 1815 rebellion among the teachers of his school, his last ten years were marred by weariness and sorrow.

In 1825 he retired to Neuhof, the place of his youth, and after writing the adventures of his life, and his last work, the Swans Song, he died at Brugg.

The arrival of BBC (a factory for the manufacture of rotating electrical machinery) in 1957-65 along with a 500 apartment housing development, resulted in a strong growth spurt.

[3] Birr has an area, as of 2007[update], of 5.05 square kilometers (1.95 sq mi).

Of the rest of the land, 1.51 square kilometers (0.58 sq mi) or 29.9% is settled (buildings or roads).

[5] The blazon of the municipal coat of arms is Azure a Pear Or slipped and leaved Vert.

[9] The age distribution, as of 2008[update], in Birr is; 488 children or 12.0% of the population are between 0 and 9 years old and 524 teenagers or 12.9% are between 10 and 19.

[11] About 38% 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] Birr's economy is dependent mainly on industry: among other businesses, ABB, GE and IC Interconnex can be found here.

The regional airfield Birrfeld (Sport flying) with its restaurant and playarea is a popular destination.

From the 2000 census[update], 1,243 or 35.2% were Roman Catholic, while 1,047 or 29.7% belonged to the Swiss Reformed Church.