Somerset County is named for Somerset County in England.
Surrounding County Courthouses:
N – Morris County
E – Union County and Middlesex County
S – Mercer County
W – Hunterdon County
Created: May 22, 1688 
County Seat:
Perth Amboy 1688 – 1714
Six Mile Run 1714 – 1773
Millstone 1773 – 1782
Somerville 1782 – present
Old County Courthouse – Somerville
Location: 40 North Bridge Street / Main Street
Built: 1907 – 1909
Style: Palladin and Beaux Arts
Architect: James Riely Gordon of Tracy and Swartwout of New York, New York
Contractor: William H Fissell and Wagner of New York, New York
Description: The building faces south and is a two story white colored Alabama marble structure. The building is located on spacious landscaped grounds. There is a high portico on the east, south and west sides with four columns rising to a pediment. The building forms a Greek cross. On the center of the roof is a round dome with thin columns, black colored roof and gold colored statue of Justice.
See: The architect James Riely Gordon of San Antonio, Texas
See: National Register of Historic Places – Somerset County Courthouse
County Courthouse – Somerville
Location: 40 North Bridge Street / Main Street
Built: 1984 – 1986
Style: Modern
Architect: Basco Associates of Marlton
Contractor: Soldo Construction Company Inc. of Mahwah
Description: The building faces west and is a five story glass, brick and concrete structure. The building is located on landscaped grounds in the center of Somerville on the west side of the old courthouse. The southwest corner of the rectangular shaped courthouse has glass panels rising to the flat roof line. On the south side is the First Reformed Dutch Church (1897) which is used for the Jury.
History: The county was created in 1688 and Perth Amoy in Middlesex County was the provincial seat of East Jersey. The court met in private homes. The first courthouse was built in 1714 to 1717 in Perth Amoy. In 1714, Six Mile Run became the county seat. The first courthouse and jail were erected in 1714. The courthouse burned in 1737. The county seat was moved to Millstone in 1737 and the second courthouse was built. The courthouse was burned by British forces in 1779. The county seat was moved to Somerville in 1782. The third courthouse was built together with the Dutch Reformed Church. In 1788, the church relinquished its use of the building. The fourth courthouse was built in 1799. The building was enlarged in 1849. The fifth courthouse was constructed in 1907 to 1909 and is still standing. The sixth and present courthouse was constructed in 1984 to 1986.
County Administration Building – Somerville
Location: 20 North Grove Street / Main Street
Built: 1989 – 1991
Style: Modern
Architect: The Musial Group
Contractor: Century 21 Construction.
Description: The building faces west and is a four story glass, steel and concrete structure.The building is located on landscaped grounds in the center of Somerville to the east of the courthouse. The windows are horizontal and the first story is recessed. The roof line is flat. On the north side is a plaza.
Old County Courthouse – Somerville
County Courthouse – Somerville
First Reform Dutch Church – Somerville
County Administration Building – Somerville
Photos taken 2011