Rock County, Wisconsin


Founding: 1839 (declared in 1836)
Parent county: Milwaukee
Namesake: The Rock River
Seat: Janesville (1839–)
Land area: 718 square miles
Population (2020): 163,687
Population (historic): 1,701 (1840); 36,690 (1860); 38,823 (1880); 51,203 (1900); 74,206 (1930)
Periods of population growth: pre-1840–1870; 1880–2020
Subdivisions: Five cities; three villages; one CDP; 20 towns
National Register listings: 146
Pre-1940 residences (estimated): 14,265 (20.2%)
Pre-1940 housing survival rate: 70.1%
Pre-1860 housing survival rate (1940): 14.4%
Farm housing in disrepair (1950): 4.6%
Average farmhouse value (1930): $2,243
Average outbuilding value (1930): $2,784
Average farmhouse size (1940): 7.1 rooms
Number of farms (1920): 3,660
Average farm size (1920): 93.8 acres
Sources of settlement: New York, Ireland, Germany, Norway, England, and New England
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Janesville
 
Namesake: Henry Janes, platter
Founding: 1835 (platting); 1837 (post office); 1853 (incorporation)
Population (2020): 65,615
Population (historic): 7,703 (1860); 9,018 (1880); 13,185 (1900); 21,628 (1930)
Periods of population growth: pre-1860–2020
Pre-1940 residences (estimated): 4,848 (16.8%)
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Outstanding Buildings

  1. *John Crist Farm (1904). 2601 Afton Road. Beloit. Queen Anne/Classical Revival.
  2. *Lewis Clark Farm (1847). 3457 Riverside Drive. Beloit. Greek Revival.
  3. *James Hanchett House (c. 1857). 2149 St. Lawrence Avenue. Beloit. Italianate.
  4. *William Wyman Farm (1872). 8608 Rye Drive. Bradford. Italianate.
  5. *James Hopkins Farm (c. 1870). 9028 US Highway 14. Center. Italianate.
  6. *Elnathan Vanderlyn Farm (c. 1890). 7620 County Road X. Clinton. Queen Anne.
  7. *Samuel Jones House (c. 1849). 11508 County Road X. Clinton. Greek Revival.
  8. *Lucius Page Farm (c. 1865). 5206 County Road M. Fulton. Italianate.
  9. *John Mullen Farm (c. 1860). 7004 Bingham Road. Harmony. Greek Revival.
  10. *Arnold–Payne House (1858/1869). 2200 West Memorial Drive. Janesville. Italianate.
  11. *John Strunk House (1844). 2306 Parker Drive. Janesville. Greek Revival.
  12. *Gideon Chapin House (1846). 3216 Parker Drive. Janesville. Greek Revival.
  13. *Adam Shoemaker Farm (1883). 1838 US Highway 14. Janesville. Italianate.
  14. *Robert Lamb Farm (c. 1875). 10239 County Road MM. Johnstown. Italianate.
  15. *John Hugunin House (1868/1875). 2739 Beloit Avenue. La Prairie. Italianate. Razed.
  16. *Kinney House (c. 1857). 1612 Hotel Drive. Milton. Italianate.
  17. *Samuel Smiley Farm (c. 1846). 10502 State Route 213. Plymouth. Greek Revival.
  18. *John White Farm (c. 1860). 8601 Caledonia Road. Porter. Italianate.
  19. *Joseph Porter Farm (1847/1860s/1920s). 11352 State Route 59. Porter.
  20. *James Miller Farm (c. 1845). 10706 Tolles Road. Porter. Greek Revival.
  21. *James Brierty House (c. 1855). 10832 US Highway 14. Porter. Greek Revival. Razed.
  22. *Elliott Barnard House (1860). 11136 US Highway 14. Porter. Italianate.
  23. *Harrison Stebbins Farm (1850). 10644 Wilder Road. Porter. Federal. Razed.
  24. *Belle Cottage / George Kellogg House (1854). 1837 Center Avenue. Rock. Gothic Revival. Razed.
  25. *Hodson House (c. 1850). 7765 Lathers Road. Turtle. Greek Revival. Razed.
  26. *Hiram Bullard Farm (1868). 13907 Bullard Road. Union. Italianate.
  27. *John Robinson Farm (1900). 18002 County Road C. Union. Queen Anne/Shingle.
  28. *Arthur Franklin Farm (c. 1895). 11059 Union Road. Union. Queen Anne. Razed.
  29. *Henry Campbell Farm (c. 1870). 13208 US Highway 14. Union. Second Empire.







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