Sullivan County, Pennsylvania

Founding: 1847
Parent county: Lycoming

Namesake: Unknown
Seat: LaPorte (1847–)

Land area: 450 square miles

Population (2020): 5,840

Population (historic): 3,694 (1850); 6,191 (1870); 12,134 (1900); 7,499 (1930)

Periods of population growth: pre-1850–1900; 1970s; 1990s

Subdivisions: Four boroughs; nine townships

National Register listings: Seven

Pre-1940 residences (estimated): 1,821 (28.6%)
Pre-1940 housing survival rate: 83.9%
Pre-1860 housing survival rate (1940): 13.5%

Farm housing in disrepair (1950): 13.4%

Nonfarm housing in disrepair (1950): 11.9%
Average farmhouse value (1930): $1,040
Average outbuilding value (1930): $958
Average farmhouse size (1940): 7.2 rooms
Number of farms (1920): 836
Average farm size (1920): 42.7 acres
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LaPorte

Namesake: John LaPorte, Pennsylvania congressman

Founding: 1847 (platting); 1852 (post office); 1853 (incorporation)

Population (2020): 320

Population (historic): 208 (1860); 192 (1880); 465 (1900); 163 (1930)

Periods of population growth: pre-1860; 1870–1900; 1930s; 1960–1990; 2000–2020
Pre-1940 residences (estimated): 116 (55.8%)
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Outstanding Buildings

1. *Zion Lutheran Church (c. 1840). 910 Kelly Road. Cherry. Greek Revival.
2. Mathias Litzelman Farm (c. 1850). 786 Litzelman Road. Cherry. Greek Revival.
3. *Clemuel Ricketts House (1855). 624 Ricketts Drive. Colley. Greek Revival.