72 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hempstead | 1 | 800,777 | 790,424 | 0.53% | 6,757 | 119 | Town |
| Oyster Bay | 2 | 301,088 | 300,294 | 0.26% | 2,906 | 104 | Town |
| North Hempstead | 3 | 240,082 | 236,834 | 0.5% | 4,484 | 54 | Town |
| Hempstead | 4 | 59,918 | 58,871 | 0.29% | 16,234 | 4 | Village |
| Freeport | 5 | 43,901 | 44,282 | -0.14% | 9,080 | 5 | Village |
| Valley Stream | 6 | 40,098 | 40,500 | -0.17% | 11,529 | 3 | Village |
| Long Beach | 7 | 34,765 | 34,801 | -0.02% | 15,674 | 2 | City |
| Glen Cove | 8 | 28,016 | 28,231 | -0.13% | 4,208 | 7 | City |
| Rockville Centre | 9 | 25,629 | 25,895 | -0.17% | 7,883 | 3 | Village |
| Garden City | 10 | 23,098 | 22,782 | 0.23% | 4,335 | 5 | Village |
| Mineola | 11 | 21,533 | 20,849 | 0.53% | 11,633 | 2 | Village |
| Lynbrook | 12 | 20,848 | 20,355 | 0.39% | 10,357 | 2 | Village |
| Massapequa Park | 13 | 16,857 | 17,052 | -0.19% | 7,690 | 2 | Village |
| Westbury | 14 | 15,901 | 15,810 | 0.09% | 6,784 | 2 | Village |
| Floral Park | 15 | 15,887 | 16,124 | -0.24% | 11,180 | 1 | Village |
| Woodbury | 16 | 12,138 | 12,186 | -0.16% | 336 | 36 | Town |
| Woodbury | 17 | 11,525 | 11,518 | 0.01% | 324 | 36 | Village |
| Great Neck | 18 | 11,060 | 11,105 | -0.06% | 8,353 | 1 | Village |
| New Hyde Park | 19 | 10,192 | 10,276 | -0.14% | 12,019 | 1 | Village |
| East Rockaway | 20 | 10,052 | 10,087 | -0.06% | 9,874 | 1 | Village |
| Farmingdale | 21 | 8,603 | 8,453 | 0.29% | 7,864 | 1 | Village |
| Malverne | 22 | 8,425 | 8,542 | -0.23% | 7,963 | 1 | Village |
| Great Neck Plaza | 23 | 8,013 | 7,445 | 1.2% | 25,765 | 0 | Village |
| Williston Park | 24 | 7,472 | 7,565 | -0.2% | 11,936 | 1 | Village |
| East Hills | 25 | 7,321 | 7,242 | 0.18% | 3,212 | 2 | Village |
| Cedarhurst | 26 | 7,310 | 7,351 | -0.1% | 10,830 | 1 | Village |
| Manorhaven | 27 | 7,017 | 6,957 | 0.14% | 14,962 | 0 | Village |
| Lawrence | 28 | 6,815 | 6,791 | 0.06% | 1,833 | 4 | Village |
| Bayville | 29 | 6,723 | 6,771 | -0.12% | 4,621 | 1 | Village |
| Kings Point | 30 | 5,714 | 5,612 | 0.3% | 1,701 | 3 | Village |
| North Hills | 31 | 5,415 | 5,450 | -0.11% | 1,964 | 3 | Village |
| Old Westbury | 32 | 5,278 | 4,293 | 3.21% | 616 | 9 | Village |
| Island Park | 33 | 5,056 | 4,945 | 0.38% | 11,362 | 0 | Village |
| Sea Cliff | 34 | 5,005 | 5,061 | -0.18% | 4,489 | 1 | Village |
| Flower Hill | 35 | 4,864 | 4,780 | 0.29% | 3,017 | 2 | Village |
| Muttontown | 36 | 3,550 | 3,483 | 0.31% | 586 | 6 | Village |
| Great Neck Estates | 37 | 3,209 | 2,932 | 1.45% | 4,189 | 1 | Village |
| Port Washington North | 38 | 3,133 | 3,171 | -0.19% | 6,541 | 0 | Village |
| Roslyn | 39 | 3,083 | 2,900 | 1.02% | 4,780 | 1 | Village |
| Brookville | 40 | 2,906 | 2,959 | -0.31% | 736 | 4 | Village |
| Lake Success | 41 | 2,835 | 2,820 | 0.11% | 1,532 | 2 | Village |
| Munsey Park | 42 | 2,767 | 2,800 | -0.18% | 5,362 | 1 | Village |
| Sands Point | 43 | 2,762 | 2,704 | 0.36% | 655 | 4 | Village |
| Thomaston | 44 | 2,721 | 2,754 | -0.18% | 6,735 | 0 | Village |
| East Williston | 45 | 2,600 | 2,639 | -0.23% | 4,569 | 1 | Village |
| Oyster Bay Cove | 46 | 2,258 | 2,254 | 0.04% | 540 | 4 | Village |
| Old Brookville | 47 | 2,108 | 2,084 | 0.19% | 529 | 4 | Village |
| Laurel Hollow | 48 | 1,946 | 1,942 | 0.05% | 658 | 3 | Village |
| Stewart Manor | 49 | 1,910 | 1,937 | -0.21% | 9,455 | 0 | Village |
| Lattingtown | 50 | 1,866 | 1,892 | -0.21% | 498 | 4 | Village |
| Upper Brookville | 51 | 1,771 | 1,770 | 0% | 412 | 4 | Village |
| South Floral Park | 52 | 1,755 | 1,737 | 0.17% | 18,093 | 0 | Village |
| Lawrence | 53 | 1,722 | 1,717 | -0.29% | 36 | 48 | Town |
| Atlantic Beach | 54 | 1,717 | 1,705 | 0.12% | 3,911 | 0 | Village |
| Plandome | 55 | 1,498 | 1,434 | 0.74% | 3,045 | 0 | Village |
| Roslyn Estates | 56 | 1,336 | 1,309 | 0.38% | 3,057 | 0 | Village |
| Hewlett Harbor | 57 | 1,318 | 1,335 | -0.23% | 1,818 | 1 | Village |
| Kensington | 58 | 1,206 | 1,200 | 0.08% | 4,748 | 0 | Village |
| Roslyn Harbor | 59 | 1,119 | 1,068 | 0.81% | 940 | 1 | Village |
| Saddle Rock | 60 | 1,014 | 986 | 0.5% | 4,008 | 0 | Village |
| Plandome Heights | 61 | 1,009 | 1,012 | 0% | 5,575 | 0 | Village |
| Baxter Estates | 62 | 1,006 | 1,023 | -0.3% | 5,527 | 0 | Village |
| Mill Neck | 63 | 1,002 | 1,019 | -0.3% | 383 | 3 | Village |
| Russell Gardens | 64 | 934 | 945 | -0.21% | 5,368 | 0 | Village |
| Woodsburgh | 65 | 878 | 884 | -0.11% | 2,598 | 0 | Village |
| Matinecock | 66 | 852 | 858 | -0.12% | 319 | 3 | Village |
| Plandome Manor | 67 | 830 | 796 | 0.73% | 1,531 | 1 | Village |
| Baldwin | 68 | 765 | 812 | -0.91% | 30 | 26 | Town |
| Hewlett Neck | 69 | 574 | 550 | 0.7% | 2,944 | 0 | Village |
| Hewlett Bay Park | 70 | 478 | 469 | 0.42% | 1,414 | 0 | Village |
| Centre Island | 71 | 393 | 398 | -0.25% | 361 | 1 | Village |
| Cove Neck | 72 | 292 | 295 | 0% | 227 | 1 | Village |
Hempstead is the largest city in Nassau County, with a population of 800,777.
Cove Neck is the smallest city in Nassau County, with a population of 292.
There are 72 cities in Nassau County, New York.