Hillsdale County, Michigan

Founding: 1835 (declared in 1829)
Parent county: Unorganized territory

Namesake: The county's hummocky terrain
Seat: Jonesville (1835–1843); Hillsdale (1843–)

Land area: 598 square miles

Population (2020): 45,746

Population (historic): 7,240 (1840); 25,675 (1860); 32,723 (1880); 29,865 (1900); 27,417 (1930)

Periods of population growth: pre-1840–1880; 1930–2010

Subdivisions: Four cities; five villages; 18 townships

National Register listings: Nine

Pre-1940 residences (estimated): 6,181 (28.3%)
Pre-1940 housing survival rate: 69.1%
Pre-1860 housing survival rate (1940): 21.3%

Farm housing in disrepair (1950): 12.2%

Nonfarm housing in disrepair (1950): 10.2%
Average farmhouse value (1930): $1,556
Average outbuilding value (1930): $1,541

Average farmhouse size (1940): 7.5 rooms
Number of farms (1920): 4,025
Average farm size (1920): 70.3 acres
Sources of settlement: New York, Ohio, Pennsylvania, England, Ireland, and Germany
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Hillsdale

Namesake: Hillsdale County

Founding: 1839 (platting); 1839 (post office); 1869 (incorporation)

Population (2020): 8,036

Population (historic): 1,067 (1850); 3,518 (1870); 4,151 (1900); 5,896 (1930)

Periods of population growth: 1839–1870; 1880–1970; 1980–2010
Pre-1940 residences (estimated): 1,249 (38.6%)
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Outstanding Buildings

1. *William Kirby House (c. 1845). 377 State Road. Adams. Greek Revival.
2. John Watkins Farm (c. 1875). 2400 Hog Creek Road. Allen. Italianate.
3. William Watkins Farm (1879). 9520 Watkins Road. Allen. Italianate.
4. John Estes House (c. 1870). 570 Evans Street. Fayette. Italianate.
5. Frederick Holloway House (c. 1870). 4355 Homer Road. Fayette. Italianate.
6. *George Mills House (c. 1850). 1020 North Adams Road. Fayette. Greek Revival.
7. *Richard Hallett House (c. 1855). 101 West Hallett Street. Hillsdale. Greek Revival.
8. Severus Roberts House (c. 1845). 1995 South Hillsdale Road. Hillsdale. Greek Revival.
9. John Johnson Farm (c. 1870). 2020 South Hillsdale Road. Hillsdale. Italianate.
10. *Isaac Vandenbergh House (1853). 180 North Wolcott Street. Hillsdale. Greek Revival.
11. Parker Dresser House (c. 1840). 9450 Homer Road. Litchfield.
12. Milton Herring Farm (c. 1870). 6995 Herring Road. Litchfield. Italianate.
13. *William Treadwell House (c. 1864). 4402 South Meridian Road. Pittsford. Italianate.
14. John Osborne Farm (c. 1870). 4640 South Meridian Road. Pittsford. Italianate.
15. Richard Fogg House (c. 1845). 8571 Homer Road. Scipio. Greek Revival.
16. Reuben Randolph House (c. 1890). 9167 Chandler Road. Somerset. Eastlake.
17. Scott Farm (c. 1855). 13700 Harper Road. Somerset. Greek Revival.
18. William Curtis Farm (c. 1870). 5910 Wheatland Road. Wheatland. Italianate. Razed.
19. Noah Fields Farm (c. 1890). 9791 South Hillsdale Road. Woodbridge. Eastlake.