County Formation. When Illinois became a state in 1818, the area that is now Marshall county was part of Bond and Clark counties. As more counties were formed, the area became part of Pike, Sangamon, Putnam, and LaSalle counties. Marshall county was established in 1839 from Putnam county.
Topeka is an incorporated town in Mason County, Illinois, United States. The population was 90 at the 2000 census. Topeka is located at 40Â°19â²48â³N 89Â°55â²52â³Wï»¿ / ï»¿40.33000Â°N 89.93111Â°Wï»¿ / 40.33000; -89.93111 (40.329960, -89.931034). According to the 2010 census, Topeka has a total area of 0.14 square miles (0.36 km 2), all land.
1903--The Kansas State Capitol building in Topeka was completed. It was constructed over a period of 37 years from 1866 to 1903, cost a total of $3.2 million. The French Renaissance style is constructed of native limestone.