The hamlet Wissenbach and Sentenhof (a former estate of the Benedictine Muri Abbey) belong to the municipality.

In 1930, a cemetery, dated to have been from between 350 and 325 BCE, was discovered north of Boswil, and is seen as evidence that the area was occupied by Celtic peoples during the same time period.

Various wall remains of farm estates and mansions from Roman times lie nearby.

Boswil and the surrounding regions were ruled by successions of counts and dukes of the Habsburgs up until 1379, when they began losing territories to the expanding Swiss Confederates.

The lords of Hallwyl maintained control over Boswil from 1380, until it was handed over to the ministrations of Muri Abbey in 1483.

Meanwhile, the eight Old Cantons of the Old Swiss Confederacy had unified and taken control in 1415, and jointly exercised power in all external affairs.

Industrialization began in 1874, when Boswil became a stop on the Aargauische Südbahn line from Aarau to Muri.

In the 1930s and the 1940s, several peat mining companies came into prominence, and an area comprising over 2 square kilometers was cleared, to a depth of 6 meters.

[3] The municipality is located in the Muri district, on the eastern slope of the Lindenberg in the Bünz river valley.

The blazon of the municipal coat of arms is Azure a Moon Or increscent with human face.

[9] About 53.6% 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).

Its term of office lasts four years, and then the majority choice candidate is selected by the people.

A justice of the peace is shared between the municipalities of Besenbueren, Bettwil, Bünzen, Kallern, Rottenschwil and Waltenschwil.

[14] The entire village of Boswil is designated as part of the Inventory of Swiss Heritage Sites.

The main road of Lenzburg-Luzern passes through the middle of the village, and serves as a public traffic route.

Since that time the old church has, at regular intervals, held cultural high level meetings, some of which received worldwide attention.

The old parsonage building served first as a home for elderly artists, then later as an area for creative art class participants.