Mercer County

US States / H-L / Illinois / Mercer County

Mercer County is named for Hugh Mercer, who was a physician and general during the American Revolutionary War and who died at the Battle of Princeton.


Created:  January 13, 1825

County Seat:

Boston        1835 – 1837

Millersburg  1837 – 1857

Aledo          1857 – present


County Courthouse – Aledo


Location:  100 SE 3rd Street / South College Avenue

Built:  1894 – 1895

Style:  Romanesque

Architect:  Mifflin Emien Bell

Contractor:  L L Leach & Sons


Description:  The building faces north and is a three story course stone structure. The building is located on landscaped grounds. The north front has two small towers with turrets rising on either side of the first story portico. The east and west wings extend from the main building. On the center of the roof is a large square clock tower with turrets and peaked roof.



N – Rock Island County

E – Henry County and Knox County

S – Warren County and Henderson County

W – Louisa County, Iowa