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
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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