South Brunswick is a township in Middlesex County, in the U.S. state of New Jersey. The township is centrally located within the Raritan Valley region and is an outer-ring suburb of New York City in the New York metropolitan area. As of the 2020 United States census, the township's population was 47,043, its highest ever decennial census count and an increase of 3,626 (+8.4%) from the 2010 census count of 43,417, which in turn reflected an increase of 5,683 (+15.1%) from the 37,734 counted in the 2000 census.Table 7. Population for the Counties and Municipalities in New Jersey: 1990, 2000 and 2010, New Jersey Department of Labor and Workforce Development, February 2011. Accessed May 1, 2023.

South Brunswick was first mentioned in minutes of the Board of Chosen Freeholders on February 28, 1778, as being formed from the township of New Brunswick. It was formally incorporated as one of New Jersey's initial group of 104 townships on February 21, 1798. Portions of the township have been taken to form Cranbury (as of March 7, 1872) and Plainsboro Township (on April 1, 1919).Snyder, John P. The Story of New Jersey's Civil Boundaries: 1606–1968, Bureau of Geology and Topography; Trenton, New Jersey; 1969. p. 174. Accessed May 30, 2024.

Niche.com placed Monmouth Junction in the top 10 of its "2021 Best Places to Live in New Jersey". In 2021, SafeWise placed South Brunswick in the "100 Safest Cities in America".

History

South Brunswick Township was incorporated by the New Jersey Legislature Act on February 21, 1798. The community was primarily agricultural in the 18th and 19th centuries. The Straight Turnpike, now Route 1, was constructed in 1804.History, Township of South Brunswick. Accessed March 8, 2020. The township got its name from New Brunswick, which in turn was named after the city of Braunschweig (called Brunswick in the Low German language), in the state of Lower Saxony, in Germany. Braunschweig was an influential and powerful city in the Hanseatic League, later in the Holy Roman Empire, and was an administrative seat for the Duchy (and later Principality) of Hanover. Shortly after the first settlement of New Brunswick in colonial New Jersey, George, Duke of Brunswick-Lüneburg, and Elector of Hanover, of the House of Hanover (also known as the House of Brunswick), became King George I of Great Britain (1660–1727). Alternatively, the city derived its name from King George II of Great Britain, the Duke of Brunswick-Lüneburg.Hutchinson, Viola L. The Origin of New Jersey Place Names, New Jersey Public Library Commission, May 1945. Accessed October 7, 2015.Gannett, Henry. The Origin of Certain Place Names in the United States, p. 223. United States Government Printing Office, 1905. Accessed October 7, 2015.

In 1872, the Legislature first reduced the size of South Brunswick by creating Cranbury from the southern portion of South Brunswick. In 1885, it redefined and enlarged the boundaries of Cranbury, and Plainsboro Township was formed in 1919. The present boundaries of South Brunswick date back to this last change.

During the 20th century, South Brunswick saw extensive transformation with the impact of changes in transportation technology. The New Brunswick and Trenton Fast Line began operation in 1900, a trolley line running parallel to the Old Straight Turnpike of 1804 (Route 1), intersecting George's Road just north of the Five Corners intersection in Dayton. This trolley provided daily passenger and freight service, stopping at a local crossroads. The New Jersey Turnpike opened in 1951, again roughly parallel to Route 1, on the eastern edge of the Township. One effect of the Turnpike opening up Interchange 8A (just outside the township) was transforming the agricultural area on the southeast corner of South Brunswick into a burgeoning industrial development. Significant portions of land between Route 130 and the turnpike consist primarily of warehouses.Cifelli, Melissa. " A landscape changes from silos to storage; Over 5M square feet of warehouses proposed in eastern S.B. this year", Sentinel, July 28, 2005. Accessed October 7, 2015.

In 1980, the township's population approached 18,000. In 1990, this figure reached 25,792; by 2020, South Brunswick had over 47,000 residents. Much of the township's remain undeveloped and there are still significant amounts of wetlands, woodlands, and open space within the community.

Geography According to the United States Census Bureau, the township had a total area of 41.02 square miles (106.23 km2), including 40.61 square miles (105.19 km2) of land and 0.40 square miles (1.04 km2) of water (0.98%).

Dayton (2020 Census population of 8,138), Deans (1,615), Heathcote (7,154), Kendall Park (9,989), Kingston (1,581) and Monmouth Junction (8,895) are unincorporated communities and census-designated places (CDPs) located within South Brunswick.New Jersey: 2010 – Population and Housing Unit Counts – 2010 Census of Population and Housing (CPH-2-32), United States Census Bureau, August 2012. Accessed November 27, 2012.GCT-PH1 – Population, Housing Units, Area, and Density: 2010 – County – County Subdivision and Place from the 2010 Census Summary File 1 for Middlesex County, New Jersey , United States Census Bureau. Accessed November 27, 2012.

Other unincorporated communities, localities and place names located partially or completely within the township include:Locality Search, State of New Jersey. Accessed April 15, 2015. Cottageville,, Franklin Park, Fresh Ponds, Little Rocky Hill, Sand Hills, South Brunswick Terrace and Ten Mile Run.

Because the township is served by several different zip codes, Dayton, Monmouth Junction, Kendall Park, Kingston, Jamesburg, Cranbury, Princeton and even North Brunswick are often used in place of the township's name, even when referring to areas located beyond their defined boundaries.

Dayton was first known simply as The Cross Roads, where James Whitlock built a tavern on Georges Road around 1750. Early enterprises included a brick manufacturer and a large nursery. In 1866, the name was changed from Cross Roads to Dayton, in honor of William L. Dayton, an attorney for the Freehold and Jamesburg Agricultural Railroad. Dayton had helped settle disputes arising from the location of a railroad right-of-way. He was later a United States Senator, was the first Republican nominee for Vice President (in 1856), and Minister to France.Chang, Kathy; and Kesten, Karen L. "Birth of a town", South Brunswick Sentinel, June 2, 2011. Accessed March 8, 2020.

Deans originated from its location on both Crosswicknung Trail (Georges Road) and Lawrence Brook. Dams were built on the brook, creating Deans Pond.

With increased mobility and a growing population, the suburban-style residential development was born after World War II. Kendall Park, located off Route 27, the old Native American trail and major thoroughfare of earlier centuries, was begun in 1957.The 1940s-1950s Moving and Building, Township of South Brunswick. Accessed May 25, 2024. "In 1957, in rural, quiet South Brunswick Township, developer Herbert Kendall, (a.k.a. Herbert Katz) began a 1,500-unit project of moderately affordable houses between Rt. 27 and Rt. 1."

Kingston's location on the Lenape Assunpink Trail where it crossed the Millstone River was the prime factor in its early prominence. Kingston was by far the most active and important community, being situated on both the heavily traveled King's Road and Millstone River, combining commercial activities of both mills and taverns. The Kingston Village Advisory Committee, jointly appointed by the South Brunswick and Franklin township councils, reports to the South Brunswick township council on matters of concern to residents of Kingston.Kingston Village Advisory Committee , Village of Kingston. Accessed September 6, 2007. Kingston has been designated as a Village Center by the New Jersey State Planning Commission and is overseen by an advisory commission that consists of seven members from Franklin Township and South Brunswick.Kingston Village Advisory Committee, Township of South Brunswick. Accessed March 8, 2020. "The KVAC is a committee of seven members from South Brunswick and Franklin Townships. KVAC oversees the implementation of the Planning and Implementation Agenda which was approved by the New Jersey State Planning Commission when Kingston was designated as a Village Center."

Monmouth Junction was created as the junction of three rail branches, the New York division of the Pennsylvania Railroad, the Rocky Hill and the Jamesburg and Freehold Railroad.

The Lawrence Brook, a tributary of the Raritan River, flows through the center of the township. The area also lies within the Manalapan Brook watershed in the eastern portion of the township and the Millstone River watershed in the western portion of the township, which are both also subwatersheds within the Raritan Basin.

Pigeon Swamp State Park is a New Jersey state park located on Deans Rhode Hall Road (Middlesex CR 610). The park has of undeveloped land., New York–New Jersey Trail Conference. Accessed July 13, 2016.

The Pigeon Swamp Ledger is a 1780 document that is an accounting log of South Brunswick landowners regarding the draining of the Pigeon Swamp.Amato, jennifer. "The 2018 calendar to highlight historical moments in South Brunswick", CentralJersey.com, October 10, 2017. Accessed May 25, 2024. "An especially intriguing project of the Historical Society – which began in the early 1970s by William Baker, was disbanded in the 1990s but was revived earlier this year by Marsola – is the Pigeon Swamp Ledger from the 1700s, which will be restored and digitized by the Conservation Center for Art & Historic Artifacts in Philadelphia and ready for public viewing next year. Marsola said that library staff looked for the ledger in the ‘90s but no one knew where it was until it was discovered in a box." This was made possible by a New Jersey Act of Legislature.

The township borders Cranbury, East Brunswick, Monroe Township, North Brunswick and Plainsboro Township in Middlesex County; Princeton in Mercer County; and Franklin Township in Somerset County.Areas touching South Brunswick, MapIt. Accessed March 8, 2020.Municipalities, Middlesex County, New Jersey. Accessed December 1, 2019.New Jersey Municipal Boundaries, New Jersey Department of Transportation. Accessed November 15, 2019.

Climate South Brunswick is in the humid continental climate zone. Average wintertime high temperatures range from , and the lows range from degrees with the record low being . Average summertime high temperatures range from , though temperatures exceed often with the record high being . The summertime lows range from degrees. South Brunswick can receive much snow during the winter months, sometimes up to . About of rain falls every month and is evenly spread throughout the year, though the area can go through long periods of drought or long-lasting periods with little to no rain. During winter and early spring, South Brunswick can in some years experience "nor'easters", which are capable of causing blizzards or flooding throughout the northeastern United States. Hurricanes and tropical storms (such as Hurricane Irene in 2011), tornadoes, and earthquakes are rare.

Demographics

2020 census The 2020 United States census counted 47,043 people in the township, which was a gain of 8.4% from the 2010 census. The racial makeup was 48.1% Asian, 35.5% white, 7.6% Black, 7.5% Hispanic or Latino, and 5.5% reported two or more races. There were 16,647 households in the township."How many people live in South Brunswick township, Middlesex County, New Jersey", Daily Record. Accessed March 27, 2023.

2010 census