Clarion County, Pennsylvania

Founding: 1840
Parent counties: Armstrong and Venango

Namesake: The Clarion River
Seat: Clarion (1839–)

Land area: 601 square miles

Population (2020): 37,241

Population (historic): 23,565 (1850); 40,328 (1880); 34,283 (1900); 34,531 (1930)

Periods of population growth: pre-1850–1880; 1900s; 1930s; 1960–1980

Subdivisions: 12 boroughs; five CDPs; 22 townships

Pre-1940 residences (estimated): 5,184 (25.5%)
Pre-1940 housing survival rate: 60%
Pre-1860 housing survival rate (1940): 14.6%

Farm housing in disrepair (1950): 5.8%

Nonfarm housing in disrepair (1950): 5.8%
Average farmhouse value (1930): $1,448
Average outbuilding value (1930): $1,530
Average farmhouse size (1940): 6.8 rooms
Number of Farms (1920): 2,931
Average Farm Size (1920): 61.4 acres
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Clarion

Namesake: The Clarion River

Founding: 1839 (platting); 1840 (post office); 1841 (incorporation)

Population (2020): 3,931

Population (historic): 719 (1850); 709 (1870); 2,004 (1900); 3,201 (1930)

Periods of population growth: 1839–1850; 1860–1890; 1900–1990
Pre-1940 residences (estimated): 478 (21.6%)
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