Somerset County

Bedminster Township [1749]
Bernards Township [1740: Northern precinct to 1760]
Bernardsville borough [1924]
Bound Brook borough [1869: town to 1891]
Branchburg Township [1845]
Bridgewater Township [1749]
Far Hills borough [1921]
Franklin Township [1740: Eastern precinct to 1798]
Green Brook Township [1872: North Plainfield to 1932]
Hillsborough Township [1771]
Manville borough [1929]
Millstone borough [1894]
Montgomery Township [1740: Western precinct to 1798]
North Plainfield borough [1885]
Peapack-Gladstone borough [1912: originally Peapack and Gladstone]
Raritan borough [1868: town to 1948]
Rocky Hill borough [1889]
SOMERVILLE borough [1863: town to 1909]- county courthouse
South Bound Brook borough [1869: town to 1907- Bloomington to 1891]
Warren Township [1806]
Watchung borough [1926]

Source:  New Jersey Localities: Civil Divisions and Municipalities; http://www.thegreenpapers.com/slg/localities.phtml?state=NJ