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

National Register listings: Two

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.