Census Counties in Illinois

Official U.S. Census Bureau and federal geographic directory listings. Showing 16 total records.

Classification: Cities & Towns CDPs Counties Subdivisions ZIP Codes Features States

State:

Entity Name	Classification	Location / State	GEOID	Land Area
Macon County	County	Illinois (IL)	17115	580.55 sq mi
Macoupin County	County	Illinois (IL)	17117	863.00 sq mi
Madison County	County	Illinois (IL)	17119	715.52 sq mi
Marion County	County	Illinois (IL)	17121	572.54 sq mi
Marshall County	County	Illinois (IL)	17123	386.82 sq mi
Mason County	County	Illinois (IL)	17125	539.35 sq mi
Massac County	County	Illinois (IL)	17127	237.15 sq mi
McDonough County	County	Illinois (IL)	17109	589.30 sq mi
McHenry County	County	Illinois (IL)	17111	603.40 sq mi
McLean County	County	Illinois (IL)	17113	1,183.25 sq mi
Menard County	County	Illinois (IL)	17129	314.39 sq mi
Mercer County	County	Illinois (IL)	17131	561.24 sq mi
Monroe County	County	Illinois (IL)	17133	385.30 sq mi
Montgomery County	County	Illinois (IL)	17135	703.77 sq mi
Morgan County	County	Illinois (IL)	17137	568.96 sq mi
Moultrie County	County	Illinois (IL)	17139	335.96 sq mi