Monmouth County, New Jersey

Founding: 1683
Parent county: Unorganized territory
Namesake: Monmouthshire, Wales
Seat: Freehold (1714–)
Land area: 469 square miles
Population (2020): 643,615
Population (historic): 16,918 (1790); 32,909 (1840); 46,195 (1870); 82,057 (1900); 147,209 (1930)
Periods of population growth: pre-1790–1840; 1850–2020
Subdivisions: Two cities; 35 boroughs; one village; 21 CDPs; 15 townships
National Register listings: 115
Pre-1940 residences (estimated): 36,438 (13.9%)
Pre-1940 housing survival rate: 62.6%
Pre-1860 housing survival rate (1940): 33.9%

Farm housing in disrepair (1950): 6.3%

Nonfarm housing in disrepair (1950): 4.7%

Average farmhouse value (1930): $3,829
Average outbuilding value (1930): $3,102
Average farmhouse size (1940): 6.9 rooms
Number of farms (1920): 2,445
Average farm size (1920): 54 acres
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Freehold

 
Namesake: Freehold Township
Founding: 1714 (founding); 1801 (post office); 1869 (incorporation)
Population (2020): 12,538
Population (historic): 2,432 (1880); 2,934 (1900); 6,894 (1930)
Periods of population growth: pre-1880–1970; 1980–2020
Pre-1940 residences (estimated): 920 (20.9%)
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Outstanding Buildings

1. *North American Phalanx (c. 1845/1847). Phalanx Road, at Lovett Road. Colt's Neck. Italianate. Razed.
2. Ryall House (c. 1875). 53 State Route 537. Colt's Neck. Second Empire.
3. *William Covenhoven House (1752–1753). 150 West Main Street. Freehold.
4. *William Holmes House (1754). 6874 Longstreet Road. Holmdel.
5. *Robert Cooke Medical Office (c. 1823). 67 McCampbell Road. Holmdel. Federal.
6. Joshua Holmes House (1874). 184 State Route 34. Holmdel. Italianate.
7. *Archibald Cobb House (1872). 275 Englishtown–Freehold Road. Manalapan. Italianate.
8. Old Brick Reformed Church (1869). 490 Newman Springs Road. Marlboro. Gothic Revival.
9. *MacLeod–Rice House (1894/1901/1915). 900 Leonardville Road. Middletown. Classical Revival.
10. *All Saints Memorial Episcopal Church (1864). 202 Navesink Avenue. Middletown. Gothic Revival.
11. *All Saints Rectory (1865). 202 Navesink Avenue. Middletown. Gothic Revival.
12. *Brinley–MacGregor House (c. 1780/1830). 407 Monmouth Road. Ocean. Greek Revival.
13. Burtis House (c. 1855). 116 Allentown–Davis Station Road. Upper Freehold. Italianate.
14. *Merino Hill / Samuel Wright Farm (c. 1735/1765/1810/1890). 678 State Route 524. Upper Freehold. Federal/Italianate.
15. Farm (1766). 3 Wygant Road. Upper Freehold.