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.)
City | Rank | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Middletown township | 1 | 66,207 | 66,994 | -0.41% | 1,617 | 41.0 | Township |
| Howell township | 2 | 53,969 | 53,487 | 0.2% | 895 | 60.3 | Township |
| Marlboro township | 3 | 41,277 | 41,560 | -0.29% | 1,360 | 30.3 | Township |
| Manalapan township | 4 | 40,388 | 40,735 | -0.29% | 1,318 | 30.7 | Township |
| Freehold township | 5 | 35,487 | 35,399 | -0.12% | 918 | 38.7 | Township |
| Long Branch | 6 | 33,066 | 31,670 | 0.98% | 6,453 | 5.1 | City |
| Neptune township | 7 | 27,833 | 28,039 | -0.55% | 3,426 | 8.1 | Township |
| Ocean township | 8 | 27,657 | 27,681 | -0.5% | 2,545 | 10.9 | Township |
| Wall township | 9 | 26,696 | 26,481 | 0.63% | 871 | 30.7 | Township |
| Hazlet township | 10 | 20,436 | 20,113 | -0.43% | 3,670 | 5.6 | Township |
| Tinton Falls borough | 11 | 19,260 | 19,133 | -0.49% | 1,245 | 15.5 | Borough |
| Aberdeen township | 12 | 19,167 | 19,288 | -0.33% | 3,523 | 5.4 | Township |
| Holmdel township | 13 | 17,368 | 17,387 | -0.19% | 973 | 17.8 | Township |
| Asbury Park | 14 | 15,616 | 15,166 | 1.46% | 10,920 | 1.4 | City |
| Eatontown borough | 15 | 13,454 | 13,576 | -0.31% | 2,303 | 5.8 | Borough |
| Red Bank borough | 16 | 12,715 | 12,907 | -0.5% | 7,282 | 1.7 | Borough |
| Freehold borough | 17 | 12,372 | 12,513 | -0.47% | 6,404 | 1.9 | Borough |
| Millstone township | 18 | 10,278 | 10,349 | -0.41% | 281 | 36.6 | Township |
| Colts Neck township | 19 | 9,868 | 9,931 | -0.38% | 321 | 30.7 | Township |
| Matawan borough | 20 | 9,659 | 9,548 | -0.46% | 4,263 | 2.3 | Borough |
| Keansburg borough | 21 | 9,592 | 9,743 | -0.58% | 8,948 | 1.1 | Borough |
| West Long Branch borough | 22 | 8,536 | 8,584 | -0.22% | 2,989 | 2.9 | Borough |
| Upper Freehold township | 23 | 7,169 | 7,262 | -0.47% | 154 | 46.5 | Township |
| Rumson borough | 24 | 7,153 | 7,332 | -0.35% | 1,412 | 5.1 | Borough |
| Keyport borough | 25 | 7,052 | 7,180 | -0.66% | 5,106 | 1.4 | Borough |
| Oceanport borough | 26 | 6,236 | 6,142 | 1.14% | 1,966 | 3.2 | Borough |
| Fair Haven borough | 27 | 6,071 | 6,248 | -0.62% | 3,811 | 1.6 | Borough |
| Little Silver borough | 28 | 6,030 | 6,127 | -0.38% | 2,223 | 2.7 | Borough |
| Manasquan borough | 29 | 5,839 | 5,928 | -0.65% | 4,231 | 1.4 | Borough |
| Belmar borough | 30 | 5,788 | 5,889 | -0.48% | 5,539 | 1.0 | Borough |
| Union Beach borough | 31 | 5,645 | 5,708 | -0.46% | 3,168 | 1.8 | Borough |
| Brielle borough | 32 | 4,894 | 4,973 | -0.53% | 2,787 | 1.8 | Borough |
| Spring Lake Heights borough | 33 | 4,805 | 4,883 | -0.6% | 3,710 | 1.3 | Borough |
| Neptune City borough | 34 | 4,563 | 4,611 | -0.39% | 5,093 | 0.9 | Borough |
| Atlantic Highlands borough | 35 | 4,363 | 4,413 | -0.46% | 3,452 | 1.3 | Borough |
| Bradley Beach borough | 36 | 4,176 | 4,282 | -1.02% | 6,846 | 0.6 | Borough |
| Shrewsbury borough | 37 | 4,129 | 4,173 | -0.48% | 1,911 | 2.2 | Borough |
| Highlands borough | 38 | 4,042 | 4,614 | -6.63% | 5,462 | 0.7 | Borough |
| Monmouth Beach borough | 39 | 3,197 | 3,179 | -0.22% | 3,068 | 1.0 | Borough |
| Spring Lake borough | 40 | 2,735 | 2,786 | -0.58% | 2,053 | 1.3 | Borough |
| Englishtown borough | 41 | 2,332 | 2,347 | -0.43% | 4,091 | 0.6 | Borough |
| Avon-by-the-Sea borough | 42 | 1,929 | 1,928 | -0.21% | 4,528 | 0.4 | Borough |
| Sea Girt borough | 43 | 1,828 | 1,870 | -0.71% | 1,725 | 1.1 | Borough |
| Allentown borough | 44 | 1,718 | 1,734 | -0.35% | 2,883 | 0.6 | Borough |
| Lake Como borough | 45 | 1,642 | 1,696 | -1.38% | 6,516 | 0.3 | Borough |
| Farmingdale borough | 46 | 1,484 | 1,502 | -0.47% | 2,854 | 0.5 | Borough |
| Sea Bright borough | 47 | 1,418 | 1,438 | -0.49% | 1,969 | 0.7 | Borough |
| Shrewsbury township | 48 | 1,066 | 1,079 | -0.47% | 10,768 | 0.1 | Township |
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.
Middletown township is the largest city in Monmouth County.
Shrewsbury township is the smallest city in Monmouth County.
There are 48 cities in Monmouth County, New Jersey.