On 1 January 2009, Gelfingen, Hämikon, Mosen, Müswangen, Retschwil and Sulz joined Hitzkirch.

Of the rest of the land, 19.7% is settled (buildings or roads) and the remainder (0.3%) is non-productive (rivers, glaciers or mountains).

Of the settled areas, 4.79% is covered with buildings, 0.41% is industrial, 0.28% is classed as special developments, 0.24% is parks or greenbelts and 3.05% is transportation infrastructure.

[8] On 21 May 2006 an attempt to merge the Hitzkirch and the surrounding 10 municipalities failed, when five of the eleven voted against the merger.

[9] A less ambitious merger was then proposed and accepted, with the municipalities of Gelfingen, Hämikon, Mosen, Müswangen, Retschwil and Sulz joining Hitzkirch.

In the 2000 census[update] the religious membership of Hitzkirch was; 3,347 (74.6%) were Roman Catholic, and 448 (10.%) were Protestant, with an additional 83 (1.85%) that were of some other Christian faith.

[12] The historical population is given in the following chart:[13][4] It is home to the Seematte prehistoric pile-dwelling (or stilt house) settlements that is part of the Prehistoric Pile dwellings around the Alps UNESCO World Heritage Site.

[14] Seematte was the site of a number of Neolithic settlements from the Cortaillod, Pfyn, Horgen and Corded Ware cultures.

The site covers a strip about 400 m (1,300 ft) long along the northern end of Lake Baldegg.

A number of ceramic, stone, flint, bone and antler items were found.