State Centers of Population 1880-2020: Illinois

Year North Latitude West Longitude
18801 40° 26′ 47″ 88° 57′ 44″
18901 40° 39′ 14″ 88° 44′ 34″
19001 40° 46′ 48″ 88° 37′ 12″
19101 40° 51′ 29″ 88° 33′ 18″
19201 40° 56′ 45″ 88° 29′ 01″
19302 41° 02′ 04″ 88° 31′ 13″
19402 41° 01′ 33″ 88° 31′ 38″
19503 41° 06′ 37″ 88° 23′ 35″
19603 41° 10′ 52″ 88° 22′ 57″
19703 41° 13′ 03″ 88° 23′ 12″
19804 41° 12′ 27″ 88° 24′ 25″
19905 41° 14′ 03″ 88° 23′ 46″
20006 41° 16′ 42″ 88° 22′ 49″
20106 41° 17′ 12″ 88° 23′ 25″
20206 41° 18' 43" 88° 22' 23"

1  Source:  U.S. Department of Commerce, Bureau of the Census, Fourteenth Census of the United States, 1923

2  Source:  U.S. Census Bureau, recomputation for historical county level data which relied upon aggregate county level population data with an estimated county centroid resulting in a possible error of up to one mile.

3  Source:  U.S. Department of Commerce, Bureau of the Census, Centers of Population for States and Counties, 1974

4  Source:  U.S. Census Bureau, Geography Division, recomputation from archived national block group/enumeration area data resulting in a possible error of up to 1,000 feet.

5  Source:  U.S. Census Bureau, Geography Division, recomputation from archived national block group data resulting in a possible error of up to 1,000 feet.

6  Source:  U.S. Census Bureau, computation from national block-level data

 

Page Last Revised - October 29, 2021