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

There are 66 cities in Middlesex County, New Jersey.

Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)

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City	Rank	State	2024 Population	2020 Census	Annual Change	Density (mi²)	Area (mi²)
New Brunswick	1	New Jersey	56,707	55,289	0.63%	10,836	5.23
Perth Amboy	2	New Jersey	55,332	55,382	-0.02%	11,869	4.66
Plainfield	3	New Jersey	54,682	54,344	0.16%	9,176	5.96
Sayreville	4	New Jersey	45,019	45,227	-0.11%	2,844	15.83
Princeton	5	New Jersey	30,152	30,602	-0.37%	1,680	17.95
Old Bridge	6	New Jersey	28,352	27,836	0.46%	3,602	7.87
Carteret	7	New Jersey	25,059	25,293	-0.23%	5,707	4.39
South Plainfield	8	New Jersey	24,169	24,287	-0.12%	2,913	8.30
North Plainfield	9	New Jersey	22,527	22,747	-0.24%	8,025	2.81
Woodbridge	10	New Jersey	21,354	20,500	1.01%	4,637	4.61
Iselin	11	New Jersey	19,666	17,356	3.03%	6,239	3.15
Colonia	12	New Jersey	18,191	17,782	-1.06%	4,514	4.03
Avenel	13	New Jersey	17,247	17,175	0.1%	5,070	3.40
South River	14	New Jersey	15,913	16,067	-0.24%	5,714	2.79
Princeton Meadows	15	New Jersey	15,773	14,261	0.6%	6,185	2.55
Highland Park	16	New Jersey	14,939	15,037	-0.16%	8,204	1.82
Metuchen	17	New Jersey	14,923	15,047	-0.21%	5,260	2.84
Middlesex	18	New Jersey	14,431	14,593	-0.28%	4,137	3.49
Robertsville	19	New Jersey	13,208	11,866	2.17%	2,238	5.90
Fords	20	New Jersey	12,817	12,509	0.6%	6,785	1.89
Kendall Park	21	New Jersey	10,752	9,852	0.6%	2,844	3.78
Monmouth Junction	22	New Jersey	9,794	8,911	0.22%	2,236	4.38
Matawan	23	New Jersey	9,655	9,547	0.28%	4,261	2.27
South Amboy	24	New Jersey	9,278	9,380	-0.27%	6,033	1.54
Dayton	25	New Jersey	8,564	8,158	1.21%	3,558	2.41
Madison Park	26	New Jersey	8,503	8,079	1.26%	4,677	1.82
Spotswood	27	New Jersey	8,052	8,122	-0.21%	3,481	2.31
Dunellen	28	New Jersey	7,535	7,615	-0.27%	7,095	1.06
Keyport	29	New Jersey	7,140	7,182	-0.14%	5,170	1.38
Yorketown	30	New Jersey	6,986	6,739	-1.55%	2,925	2.39
Milltown	31	New Jersey	6,955	7,019	-0.23%	4,476	1.55
Laurence Harbor	32	New Jersey	6,670	6,041	1.93%	2,262	2.95
Strathmore	33	New Jersey	6,474	7,514	-3.21%	3,288	1.97
Heathcote	34	New Jersey	6,207	7,389	-4.36%	1,980	3.13
Rutgers University-Busch Campus	35	New Jersey	5,803	7,718	-6.9%	4,745	1.22
Jamesburg	36	New Jersey	5,719	5,763	-0.19%	6,484	0.88
Union Beach	37	New Jersey	5,698	5,712	-0.05%	3,198	1.78
Port Reading	38	New Jersey	4,107	3,973	0.83%	2,078	1.98
Menlo Park Terrace	39	New Jersey	3,603	2,503	7.23%	9,685	0.37
Hopelawn	40	New Jersey	3,363	2,457	7.24%	7,696	0.44
Rutgers University-Livingston Campus	41	New Jersey	3,201	1,941	10.91%	2,396	1.34
Cliffwood Beach	42	New Jersey	2,992	3,024	-0.27%	3,302	0.91
Plainsboro Center	43	New Jersey	2,762	2,715	-0.07%	3,758	0.73
Rossmoor	44	New Jersey	2,756	2,700	-0.29%	4,083	0.68
Sewaren	45	New Jersey	2,682	2,708	-0.22%	2,195	1.22
Keasbey	46	New Jersey	2,665	2,825	-1.48%	1,825	1.46
Cranbury	47	New Jersey	2,647	2,213	4.29%	2,163	1.22
Concordia	48	New Jersey	2,638	2,520	-1.35%	3,426	0.77
Forsgate	49	New Jersey	2,574	1,803	5.62%	2,942	0.88
Clearbrook	50	New Jersey	2,560	2,648	-0.85%	3,382	0.76
Monroe Manor	51	New Jersey	2,485	2,180	-1.27%	8,719	0.28
Helmetta	52	New Jersey	2,427	2,451	-0.25%	2,931	0.83
Whittingham	53	New Jersey	2,395	2,507	-0.58%	3,491	0.69
Regency Monroe	54	New Jersey	2,388	1,891	5.48%	3,294	0.72
Englishtown	55	New Jersey	2,352	2,346	0.08%	4,126	0.57
Ten Mile Run	56	New Jersey	2,161	1,801	-1.82%	851	2.54
Princeton Junction	57	New Jersey	2,055	1,989	0.83%	1,127	1.82
Brownville	58	New Jersey	1,954	2,412	-5.51%	1,826	1.07
Stonebridge	59	New Jersey	1,847	1,649	0%	4,033	0.46
Kingston	60	New Jersey	1,615	963	11.23%	862	1.87
Griggstown	61	New Jersey	1,346	858	9.97%	551	2.44
The Ponds	62	New Jersey	923	911	0.33%	4,234	0.22
Deans	63	New Jersey	747	1,351	-16.81%	666	1.12
Renaissance Monroe	64	New Jersey	635	556	-4.22%	3,629	0.17
Encore Monroe	65	New Jersey	540	560	-0.92%	2,813	0.19
East Rocky Hill	66	New Jersey	487	335	8.46%	117	4.17

showing: 66 rows

Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.

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?

East Rocky Hill is the smallest city in Middlesex County.

How many cities are in Middlesex County?