Franklin County, Pennsylvania

Founding: 1784
Parent county: Cumberland

Namesake: Benjamin Franklin, Founding Father
Seat: Chambersburg (1784–)

Land area: 772 square miles

Population (2020): 155,932

Population (historic): 15,662 (1790); 37,793 (1840); 45,365 (1870); 54,902 (1900); 65,010 (1930)

Periods of population growth: pre-1790–2020

Subdivisions: Six boroughs; 10 CDPs; 15 townships

National Register listings: 65

Pre-1940 residences (estimated): 11,044 (17%)
Pre-1940 housing survival rate: 72.8%
Pre-1860 housing survival rate (1940): 31%

Farm housing in disrepair (1950): 5.4%

Nonfarm housing in disrepair (1950): 4.3%
Average farmhouse value (1930): $1,985
Average outbuilding value (1930): $1,979
Average farmhouse size (1940): 7.1 rooms
Number of farms (1920): 3,884
Average farm size (1920): 74.3 acres
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Chambersburg

Namesake: Benjamin Chambers, owner of the city's site

Founding: 1764 (platting); 1788 (post office); 1803 (incorporation)

Population (2020): 21,903

Population (historic): 1,304 (1810); 3,335 (1850); 6,308 (1870); 8,864 (1900); 13,788 (1930)

Periods of population growth: pre-1830–1960; 1980–2020
Pre-1940 residences (estimated): 2,628 (28.8%)
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Outstanding Buildings

1. Frederick Sheely Farm. 9670 Grindstone Hill Road. Antrim.
2. Samuel Snively Farm (c. 1880). 12450 Hollowell Church Road. Antrim. Second Empire.
3. *Jacob Stover Farm (c. 1845). 408 Leitersburg Road. Antrim.
4. *John Eshelman Farm (c. 1840). 405 Milnor Road. Antrim.
5. Joseph Whitmore House (1795). 11412 Stull Road. Antrim. Georgian.
6. *Robert Johnston Farm (c. 1785/1850). 12334 Williamsport Pike. Antrim. Georgian.
7. *John Hade Farm (c. 1780). 14007 Williamsport Pike. Antrim.
8. *Andrew Snively House (1781). 763 Zarger Road. Antrim.
9. John Stitt Farm (c. 1835). 18599 Shearer Road. Fannett. Federal.
10. Miller Farm. 19677 Spring Run Road. Fannett.
11. *James Finley House (c. 1788/1870s). 541 Coffey Avenue. Greene. Italianate.
12. *John Thompson Farm (c. 1815/1905). 1237 Garver Lane. Greene.
13. William Clark Farm. 178 Musser Road. Greene. Federal.
14. *Culbertson–Harbison Farm (c. 1798/1830). 7279 Nyesville Road. Greene.
15. *Samuel Crawford House. 587 Woodstock Road. Greene. Federal.
16. *Henry George House (c. 1835). 5840 Anthony Highway. Guilford. Federal.
17. *John Brotherton Farm (c. 1820). 1447 Falling Spring Road. Guilford. Federal.
18. Samuel Frederick Farm. 670 Miller Road. Guilford.
19. *James Riddle Farm (c. 1800). 955 Spring Lane. Guilford. Georgian.
20. Joseph Crider Farm (c. 1860). 6261 Edenville Road. Hamilton.
21. *John Greenawalt House (c. 1843/1880). 1085 West Lincoln Highway. Hamilton. Italianate.
22. *Rocky Spring Presbyterian Church (1794). 4006 Rocky Spring Road. Letterkenny. Georgian.
23. *John Skinner House (c. 1790/1840). 13361 Upper Strasburg Road. Letterkenny.
24. *Irwinton / Archibald Irwin Farm (c. 1780/1790). 9685 Anderson Road. Montgomery.
25. *John Work Farm (c. 1775). 9399 Blue Spring Road. Montgomery.
26. Henry Eberly House (c. 1880). 7701 Fort Loudon Road. Montgomery. Italianate.
27. *Millmont (c. 1800). 16 Mercersburg Road. Montgomery. Federal.
28. *McCoy Springhouse–Dwelling. 9438 Welsh Run Road. Montgomery.
29. *Benjamin Jordan House (c. 1825). 6801 Findlay Road. Peters.
30. *Farm (c. 1890). 7189 Findley Road. Peters. Gothic Revival.
31. James Lowe Farm. 4003 Mercersburg Road. Peters.
32. Hezekiah Easton Farm (c. 1835). 368 Mountain Road. Peters. Federal.
33. *Christian Frick Farm (c. 1840). 7685 Anthony Highway. Quincy.
34. *Snow Hill Cloister (1814). 9400 Anthony Highway. Quincy.
35. Wilson House (c. 1810). 8683 Campbell's Run Road. St. Thomas.
36. *Chambers and Bedford Pike Toll House (1818). 8235 Lincoln Highway. St. Thomas.
37. *William McDowell Farm (c. 1760/1790). 2055 Mercersburg Road. St. Thomas.
38. Samuel Strock Farm. 5015 Warm Spring Road. St. Thomas.
39. *Springdale Mill (1857). 18139 Amsterdam Road. Washington.
40. *Jeremiah Burns Farm (1832). 10988 Fish and Game Road. Washington.
41. *Harbaugh Reformed Church (1892). 14301 Harbaugh Church Road. Washington. Gothic Revival.
42. *David Stoner House (c. 1790). 8777 Lyons Road. Washington.
43. *Daniel Royer Farm (c. 1812/1815). 1010 East Main Street. Washington.
44. *Salem Reformed Church (1842). 4881 Salem Church Road. Washington. Gothic Revival.
45. George Sarbaugh Farm (c. 1840). 12955 Scott Road. Washington.
46. *Samuel Frantz Farm (1847). 13191 Welty Road. Washington. Greek Revival.