Middlesex County, NJ

Settlement & growth (pre-1960)

The original inhabitants of the area were the Lenape people, specifically the Raritan and Unami bands, who lived along the Raritan River and its tributaries for centuries before European contact. Dutch and English colonists began settling the region in the mid-1600s, establishing towns like Perth Amboy (1683) as the capital of East Jersey and New Brunswick (1681) as a key trading post. The British took formal control in 1664, and the area’s fertile soil and river access attracted a mix of English, Dutch, and Scots-Irish farmers throughout the 18th century.

The 19th century brought transformative waves of immigration. The construction of the Delaware and Raritan Canal (1834) and the arrival of the Camden and Amboy Railroad turned towns like New Brunswick, South Amboy, and Woodbridge into industrial and transportation hubs. Irish immigrants fleeing the Great Famine (1845-1852) arrived in large numbers to dig the canal and lay railroad tracks, settling in working-class neighborhoods in Perth Amboy and New Brunswick. German immigrants followed in the 1850s and 1860s, establishing farms and breweries in areas like Piscataway and Highland Park, while also forming tight-knit communities in the cities.

The late 19th and early 20th centuries saw a massive influx of Southern and Eastern Europeans. Italians, Poles, and Hungarians came to work in the county’s booming industries—brickmaking in Sayreville, shipbuilding in Perth Amboy, and manufacturing in New Brunswick. By 1910, Perth Amboy had one of the largest Polish communities in New Jersey, centered around St. Mary’s Church, while Italian immigrants dominated the neighborhoods of New Brunswick’s Fifth Ward. Jewish immigrants from Russia and Eastern Europe also arrived, establishing a significant presence in New Brunswick and Highland Park, where they built synagogues and community institutions.

The Great Migration of African Americans from the South began in earnest during World War I and continued through the 1950s, drawn by industrial jobs in factories and the port. Black communities formed in Perth Amboy, New Brunswick, and Carteret, though they faced systemic housing discrimination and redlining that confined them to specific neighborhoods. The post-World War II era brought suburbanization: the construction of the Garden State Parkway (1947) and Route 1 opened up farmland in Edison, Woodbridge, and East Brunswick for housing developments, attracting white ethnic families leaving the older cities. By 1960, Middlesex County was predominantly white (over 90%), with a strong blue-collar and middle-class character rooted in its industrial and ethnic heritage.

Modern era (post-1965)

The 1965 Hart-Cellar Immigration Act fundamentally reshaped Middlesex County’s demographics. The first major wave came from India, beginning in the 1970s and accelerating through the 1990s. Highly educated professionals—engineers, doctors, and IT specialists—were drawn by job opportunities in New Brunswick’s pharmaceutical sector (Johnson & Johnson headquarters) and the growing tech corridor along Route 1. The Indian community concentrated heavily in Edison, Piscataway, and Woodbridge, where they built temples, grocery stores, and cultural centers. Today, Indians constitute 18.5% of the county’s population, the highest share of any county in New Jersey, with Edison often cited as having one of the largest Indian communities in the United States.

East and Southeast Asian immigration also grew, though at a smaller scale. Chinese, Korean, and Filipino professionals settled in Edison and Highland Park, drawn by the same tech and pharmaceutical industries. These communities now make up 6.5% of the population, with Edison’s “Little India” district also hosting Chinese and Korean businesses. Hispanic immigration surged from the 1980s onward, driven by both legal family reunification and undocumented migration. Puerto Ricans, Dominicans, Mexicans, and Central Americans settled in Perth Amboy, New Brunswick, and Carteret, where they revitalized older industrial neighborhoods. Perth Amboy is now over 80% Hispanic, while New Brunswick’s Hispanic population exceeds 50%, making the county 23.0% Hispanic overall.

Domestic migration patterns also shifted. The decline of manufacturing in the 1970s and 1980s led to job losses in Perth Amboy and South Amboy, but the rise of the pharmaceutical and logistics sectors in Edison, East Brunswick, and Monroe Township attracted new residents from other parts of New Jersey and New York. White flight from older cities to outer suburbs like Monroe and Cranbury accelerated in the 1990s and 2000s, while the county’s Black population (9.6%) remained concentrated in New Brunswick, Perth Amboy, and Carteret, with some movement to Edison and Woodbridge. The foreign-born population now stands at 14.6%, a figure that understates the cultural impact of second-generation immigrants who are fully integrated into the county’s economy and schools.