After 1100, the land belonged to the monastery on Einsiedeln, and was influenced by the Battle of Morgarten.

In 1766 the governments of Oberägeri and Unterägeri (at the time known as Wilägeri) became involved in an open fight during local parliamentary sessions, and the two municipalities split in 1798.

Of the rest of the land, 6.7% is settled (buildings or roads) and the remainder (1.8%) is non-productive (rivers, glaciers or mountains).

Known as Wilägeri, an outlying settlement of Ägeri, the community split in 1798, at the formation of the Helvetic Republic, into two municipalities, Oberägeri and Unterägeri.

[4] In the 2007 federal election the most popular party was the SVP which received 32% of the vote.