Butler County, Pennsylvania

Founding: 1803 (declared in 1800)
Parent county: Allegheny

Namesake: Richard Butler, Continental Army officer
Seat: Butler (1803–)

Land area: 789 square miles

Population (2020): 193,763

Population (historic): 3,916 (1800); 22,378 (1840); 36,510 (1870); 56,962 (1900); 80,480 (1930)

Periods of population growth: pre-1800–2020

Subdivisions: One city; 23 boroughs; nine CDPs; 33 townships

National Register listings: 13

Pre-1940 residences (estimated): 12,484 (15.3%)
Pre-1940 housing survival rate: 59.4%
Pre-1860 housing survival rate (1940): 16.8%

Farm housing in disrepair (1950): 14.6%

Nonfarm housing in disrepair (1950): 7.7%
Average farmhouse value (1930): $1,815
Average outbuilding value (1930): $1,494
Average farmhouse size (1940): 5.9 rooms
Number of farms (1920): 5,274
Average farm size (1920): 56 acres
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Butler

Namesake: Richard Butler, Continental Army officer

Founding: 1803 (platting); 1805 (post office); 1816 (incorporation)

Population (2020): 13,502

Population (historic): 225 (1820); 1,148 (1850); 1,935 (1870); 10,853 (1900); 23,568 (1930)

Periods of population growth: pre-1820–1920; 1930s
Pre-1940 residences (estimated): 3,527 (51.4%)
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Outstanding Buildings

1. *United Presbyterian Orphans' Home (1908). 521 State Route 228. Adams. Tudor Revival.
2. *George Ebert House (c. 1875). 540 State Route 228. Adams. Italianate.
3. *John Brown Inn (1822). 2865 William Flynn Highway. Brady.
4. St. John Catholic Church (c. 1890). 668 Clearfield Road. Clearfield. Gothic Revival.
5. House (c. 1860). 2939 Old US Highway 422. Clearfield. Gothic Revival.
6. Joseph Hartman Farm (c. 1875). 787 East Slippery Rock Road. Donegal. Italianate.
7. Farm (c. 1885). 1155 Kittanning Pike. Fairview. Italianate.
8. Farm (c. 1890). 614 Prospect Road. Forward. Stick.
9. *David Ziegler House (c. 1865). 202 Nickle Road. Jackson. Italianate.
10. *John Boyer House (c. 1810). 295 Perry Highway. Jackson.
11. *Harmony Mennonite Meeting House (1825). 114 Wise Road. Jackson.
12. *Stauffer Farm (c. 1830/1859). 333 Perry Highway. Lancaster.
13. *McJunkin–Shepard House (c. 1840/1875). 466 Centreville Pike. Slippery Rock. Italianate.