Montgomery County is a county located in the state of Illinois. According to the 2010 census, it had a population of 30,104. Montgomery County was created on February 21, 1821. The county seat is Hillsboro. The county is named for General Richard Montgomery (1738-1775), brigadier-general in the Continental Army who led the unsuccessful invasion of Canada.
The county is named for General Richard Montgomery, revolutionary soldier of Irish birth. General Montgomery, who led the unsuccessful invasion of Canada, was killed at Quebec in 1775.
County QuickFacts: CensusBureau Quick Facts
Montgomery County was created on February 21, 1821 (Laws, 1821, p. 142) and was formed from Bond and Madison
Counties. Present area), or parts of it), formerly included in: Fayette (small eastern section) County (1821-1827),Bond
County (1817-1821), Madison County (1812-1821), St. Clair County (1790-1812) and Knox), Northwest Territory (1790-1801).
The County was named for Richard Montgomery, a Revolutionary General, of Irish birth, who was killed before Quebec on
December 31, 1775. The County Seat is Hillsboro . Prior County Seats was Hamilton- Designated but never established
(1821-1823) and Hillsboro (1823-Present).
As reported by the Census Bureau, the county has a total area of 710 square miles (1,838 km2), of which, 704 square miles (1,823 km2) of it is land and 6 square miles (15 km2) of it (0.84%) is water.
Montgomery county is located close to the center of Illinois. Coffeen
Lake State Fish and Wildlife Area is located in this county.
Bordering counties are as follows: