Marshall County, Illinois

Founding: 1839
Parent county: Putnam

Namesake: John Marshall, Supreme Court chief justice
Seat: Lacon (1839–)

Land area: 387 square miles

Population (2020): 11,742

Population (historic): 1,849 (1840); 13,437 (1860); 15,055 (1880); 16,370 (1900); 13,023 (1930)

Periods of population growth: pre-1840–1870; 1890s; 1930s; 1950s; 1970s; 1990s

Subdivisions: Four cities; five villages; 12 townships

Pre-1940 residences (estimated): 1,735 (29.4%)
Pre-1940 housing survival rate: 57.7%
Pre-1860 housing survival rate (1940): 10.3%

Farm housing in disrepair (1950): 2.9%

Nonfarm housing in disrepair (1950): 4.4%

Average farmhouse value (1930): $2,128
Average outbuilding value (1930): $2,347

Average farmhouse size (1940): 6.9 rooms
Number of farms (1920): 1,231
Average farm size (1920): 150.4 acres
Sources of settlement: Germany, Ohio, Pennsylvania, New York, and Ireland
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Lacon

Namesake: Laconia, Greece

Founding: 1831 (platting); 1837 (post office); 1839 (incorporation)

Population (2020): 1,878

Population (historic): 963 (1850); 2,105 (1870); 1,649 (1890); 1,495 (1910); 1,548 (1930)

Periods of population growth: pre-1850–1870; 1920–1960
Pre-1940 residences (estimated): 291 (32.8%)
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Outstanding Buildings

1. William Williams Farm (c. 1865). 1318 Western Road. Henry. Italianate.
2. George Shaw House (c. 1845). 733 Century Road. Roberts.
3. Livingston Roberts House (c. 1840). 1042 State Route 89. Roberts. Federal.
4. William Fountain House (1853). 1475 Yankee Lane. Whitefield. Greek Revival.

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