There are 39 cities in Middlesex County, New Jersey.

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City
Rank
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
New Brunswick155,39655,289-0.54%10,5865.23
Perth Amboy255,14755,382-0.19%11,8294.66
Sayreville344,95945,227-0.18%2,84015.83
Old Bridge428,09427,836 3,9507.11
Carteret525,09625,293-0.16%5,7154.39
South Plainfield624,08424,287-0.3%2,9038.30
Woodbridge720,92720,500 5,3843.89
Colonia818,58117,782 4,7333.93
Iselin918,51117,356 5,8063.19
Avenel1017,21117,175 4,9463.48
South River1115,94016,067-0.16%5,7242.79
Princeton Meadows1215,58514,261 7,5142.07
Metuchen1314,95715,047-0.09%5,2502.85
Highland Park1414,94615,037-0.14%8,2081.82
Middlesex1514,45414,593-0.2%4,1443.49
Fords1612,66312,509 4,7372.67
Kendall Park1710,6249,852 2,8873.68
Monmouth Junction189,7508,911 6,5261.49
South Amboy199,2899,380-0.21%6,0401.54
Dayton208,3618,158 3,9682.11
Madison Park218,2918,079 4,9681.67
Spotswood228,0718,122-0.1%3,4982.31
Dunellen237,5517,615-0.16%7,1101.06
Milltown246,9657,019-0.16%4,4821.55
Heathcote256,7737,389 2,5992.61
Laurence Harbor266,4186,041 2,1762.95
Jamesburg275,7335,763-0.07%6,5000.88
Port Reading284,0403,973 1,7962.25
Rossmoor292,7722,700 3,0830.90
Plainsboro Center302,7662,715 3,6440.76
Concordia312,7102,520 2,6181.03
Sewaren322,6952,708 2,8400.95
Helmetta332,4312,451-0.16%2,9360.83
Cranbury342,4302,213 2,0071.21
Whittingham352,4232,507 2,4400.99
Brownville362,1832,412 2,1701.01
Kingston371,289963 5752.24
Clearbrook Park380.87
Society Hill391.38
showing: 39 rows

Cities in Middlesex County, New Jersey by Population (2024)

What is the largest city in Middlesex County, New Jersey?

New Brunswick is the largest city in Middlesex County.

What is the smallest city in Middlesex County, New Jersey?

Society Hill is the smallest city in Middlesex County.

How many cities are in Middlesex County?

There are 39 cities in Middlesex County, New Jersey.

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