Macon County, Illinois

Founding: 1829
Parent county: Unorganized territory

Namesake: Nathaniel Macon, North Carolina politician
Seat: Decatur (1829–)

Land area: 581 square miles

Population (2020): 103,998

Population (historic): 1,122 (1830); 3,988 (1850); 26,481 (1870); 44,003 (1900); 81,731 (1930)

Periods of population growth: pre-1830–1980

Subdivisions: Three cities; nine villages; one CDP; 17 townships

Pre-1940 residences (estimated): 9,589 (19%)
Pre-1940 housing survival rate: 43.1%
Pre-1860 housing survival rate (1940): 12.5%

Farm housing in disrepair (1950): 4.9%

Nonfarm housing in disrepair (1950): 4.2%

Average farmhouse value (1930): $2,161
Average outbuilding value (1930): $1,957

Average farmhouse size (1940): 6.1 rooms
Number of farms (1920): 2,528
Average farm size (1920): 131.8 acres
Sources of settlement: Ohio, Pennsylvania, Indiana, Kentucky, Germany, Ireland, and New York
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Decatur

Namesake: Stephen Decatur, U.S. naval officer

Founding: 1829 (platting); 1831 (post office); 1839 (incorporation)

Population (2020): 70,522

Population (historic): 3,839 (1860); 9,547 (1880); 20,754 (1900); 57,510 (1930)

Periods of population growth: pre-1860–1980
Pre-1940 residences (estimated): 7,241 (20.3%)
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