Founded in 1899, Nassau County is one of 62 counties in the state of New York. Historically, Nassau County was formed from Queens County. The city of Mineola is the county seat. With FIPS code of 59, Nassau County has a population of 1,390,907 and area of 453 square miles (1,173 km2).
List of all cities in Nassau County, NY alphabetically
| City/Town | Postal Code | Area Code |
| Abmps, NY | 11535 | 516 |
| Albertson, NY | 11507 | 516 |
| Alden Manor, NY | 11003 | 516 |
| Allenwood, NY | 11021 | 516 |
| Argo Village, NY | 11003 | 516 |
| Atlantic Beach, NY | 11509 | 516 |
| Baldwin, NY | 11510 | 516 |
| Baldwin Harbor, NY | 11510 | 516 |
| Bar Harbor, NY | 11762 | 516 |
| Barnum Island, NY | 11558 | 516 |
| Baxter Estates, NY | 11050 | 516 |
| Bayville, NY | 11709 | 516 |
| Bellerose Terrace, NY | 11001 | 516 |
| Bellerose Village, NY | 11001 | 516 |
| Bellmore, NY | 11710 | 516 |
| Bellrose Village, NY | 11001 | 516 |
| Bethpage, NY | 11714 | 516 |
| Briar Park, NY | 11793 | 516 |
| Brookville, NY | 11545 | 516 |
| 11548 | 516 | |
| Carle Place, NY | 11514 | 516 |
| Cedarhurst, NY | 11516 | 516 |
| Centre Island, NY | 11771 | 516 |
| Chase Bank, NY | 11819 | 516 |
| 11853 | 516 | |
| Citibank, NY | 11555 | 516 |
| Cove Neck, NY | 11771 | 516 |
| Creative Mailing Service, NY | 11736 | 516 |
| East Atlantic Beach, NY | 11561 | 516 |
| East Farmingdale, NY | 11735 | 516 |
| East Hills, NY | 11548 | 516 |
| 11576 | 516 | |
| 11577 | 516 | |
| East Massapequa, NY | 11758 | 516 |
| East Meadow, NY | 11554 | 516 |
| East Norwich, NY | 11732 | 516 |
| East Rockaway, NY | 11518 | 516 |
| East Williston, NY | 11596 | 516 |
| Elmont, NY | 11003 | 516 |
| Far Rockaway, NY | 11096 | 516 |
| Farmingdale, NY | 11735 | 516 |
| 11736 | 516 | |
| 11737 | 516 | |
| 11774 | 516 | |
| Floral Park, NY | 11001 | 516 |
| 11002 | 516 | |
| 11003 | 516 | |
| Franklin Square, NY | 11010 | 516 |
| Freeport, NY | 11520 | 516 |
| Fulfillment, NY | 11774 | 516 |
| Garden City, NY | 11530 | 516 |
| 11531 | 516 | |
| 11535 | 516 | |
| 11599 | 516 | |
| Garden City Park, NY | 11040 | 516 |
| Garden City South, NY | 11530 | 516 |
| Glen Cove, NY | 11542 | 516 |
| Glen Head, NY | 11545 | 516 |
| Glenwood Landing, NY | 11547 | 516 |
| Great Neck, NY | 11020 | 516 |
| 11021 | 516 | |
| 11022 | 516 | |
| 11023 | 516 | |
| 11024 | 516 | |
| 11026 | 516 | |
| 11027 | 516 | |
| Great Neck Estates, NY | 11021 | 516 |
| Great Nk, NY | 11020 | 516 |
| Greenvale, NY | 11548 | 516 |
| Harbor Acres, NY | 11050 | 516 |
| Harbor Hills, NY | 11023 | 516 |
| Harbor Island, NY | 11558 | 516 |
| Hempstead, NY | 11549 | 516 |
| 11550 | 516 | |
| 11551 | 516 | |
| Herricks, NY | 11040 | 516 |
| Hewlett, NY | 11557 | 516 |
| Hewlett Bay, NY | 11557 | 516 |
| Hewlett Bay Park, NY | 11557 | 516 |
| Hewlett Harbor, NY | 11557 | 516 |
| Hewlett Neck, NY | 11598 | 516 |
| Hicksville, NY | 11801 | 516 |
| 11802 | 516 | |
| 11803 | 516 | |
| 11804 | 516 | |
| 11815 | 516 | |
| 11819 | 516 | |
| 11854 | 516 | |
| 11855 | 516 | |
| Hicksville Crm Firms, NY | 11855 | 516 |
| Hicksville Firms, NY | 11854 | 516 |
| Hillside Manor, NY | 11040 | 516 |
| Hoffmeister, NY | 11549 | 516 |
| Hofstra University, NY | 11549 | 516 |
| Inwood, NY | 11096 | 516 |
| Inwood Finance, NY | 11096 | 516 |
| Island Park, NY | 11558 | 516 |
| Island Trees, NY | 11756 | 516 |
| Jericho, NY | 11753 | 516 |
| Jericho, NY | 11853 | 516 |
| Kenilworth, NY | 11024 | 516 |
| Kensington, NY | 11021 | 516 |
| Kings Point, NY | 11024 | 516 |
| L I Power Authority, NY | 11815 | 516 |
| Lake Gardens, NY | 11022 | 516 |
| Lake Success, NY | 11020 | 516 |
| 11040 | 516 | |
| 11042 | 516 | |
| Lakeview, NY | 11552 | 516 |
| 11570 | 516 | |
| Lakeville Estates, NY | 11040 | 516 |
| Lattingtown, NY | 11560 | 516 |
| Laurel Hollow, NY | 11771 | 516 |
| 11791 | 516 | |
| Lawrence, NY | 11559 | 516 |
| Levittown, NY | 11756 | 516 |
| Lido Beach, NY | 11561 | 516 |
| Locust Valley, NY | 11560 | 516 |
| Locustwood, NY | 11003 | 516 |
| Long Beach, NY | 11561 | 516 |
| Lynbrook, NY | 11563 | 516 |
| Malverne, NY | 11565 | 516 |
| Manhasset, NY | 11030 | 516 |
| Manhasset Hills, NY | 11040 | 516 |
| Manorhaven, NY | 11050 | 516 |
| Massapequa, NY | 11758 | 516 |
| Massapequa Park, NY | 11762 | 516 |
| Matinecock, NY | 11560 | 516 |
| Meacham, NY | 11003 | 516 |
| Meadowmere Park, NY | 11559 | 516 |
| Merrick, NY | 11566 | 516 |
| Mill Neck, NY | 11765 | 516 |
| Mineola, NY | 11501 | 516 |
| Mitchell Field, NY | 11530 | 516 |
| Mitchell Field, NY | 11553 | 516 |
| Muttontown, NY | 11545 | 516 |
| 11732 | 516 | |
| 11753 | 516 | |
| 11771 | 516 | |
| 11791 | 516 | |
| New Cassel, NY | 11590 | 516 |
| New Hyde Park, NY | 11040 | 516 |
| 11042 | 516 | |
| No New Hyde Park, NY | 11040 | 516 |
| North Baldwin, NY | 11510 | 516 |
| North Bellmore, NY | 11710 | 516 |
| North H P, NY | 11040 | 516 |
| North Hills, NY | 11040 | 516 |
| North Massapequa, NY | 11758 | 516 |
| North Merrick, NY | 11566 | 516 |
| North New Hyde Park, NY | 11040 | 516 |
| 11042 | 516 | |
| North Valley Stream, NY | 11580 | 516 |
| North Wantagh, NY | 11793 | 516 |
| North Woodmere, NY | 11581 | 516 |
| Oceanside, NY | 11572 | 516 |
| Old Bethpage, NY | 11804 | 516 |
| Old Brookville, NY | 11545 | 516 |
| 11548 | 516 | |
| Old Westbury, NY | 11568 | 516 |
| Oyster Bay, NY | 11771 | 516 |
| Oyster Bay Cove, NY | 11771 | 516 |
| 11791 | 516 | |
| Plainedge, NY | 11756 | 516 |
| Plainview, NY | 11803 | 516 |
| Plandome, NY | 11030 | 516 |
| Point Lookout, NY | 11569 | 516 |
| Point Wash, NY | 11050 | 516 |
| Port Wash, NY | 11050 | 516 |
| Port Washington, NY | 11050 | 516 |
| 11051 | 516 | |
| 11052 | 516 | |
| 11053 | 516 | |
| 11054 | 516 | |
| 11055 | 516 | |
| Publishers Clear House, NY | 11052 | 516 |
| Publishers Clearing House, NY | 11053 | 516 |
| 11054 | 516 | |
| 11055 | 516 | |
| 11773 | 516 | |
| Publishers Clearing Hse Brm, NY | 11051 | 516 |
| Rockville Center, NY | 11570 | 516 |
| 11571 | 516 | |
| 11572 | 516 | |
| 11570 | 516 | |
| 11571 | 516 | |
| 11572 | 516 | |
| Roosevelt, NY | 11575 | 516 |
| Roosevelt Field, NY | 11530 | 516 |
| 11531 | 516 | |
| Roslyn, NY | 11576 | 516 |
| Roslyn Estates, NY | 11576 | 516 |
| Roslyn Harbor, NY | 11545 | 516 |
| 11548 | 516 | |
| 11576 | 516 | |
| Roslyn Heights, NY | 11577 | 516 |
| Russell Gardens, NY | 11021 | 516 |
| Saddle Rock, NY | 11023 | 516 |
| Saddle Rock Estates, NY | 11021 | 516 |
| Sands Point, NY | 11050 | 516 |
| Sea Cliff, NY | 11579 | 516 |
| Seaford, NY | 11783 | 516 |
| South Farmingdale, NY | 11735 | 516 |
| South Floral Park, NY | 11001 | 516 |
| South Hempstead, NY | 11550 | 516 |
| Stewart Manor, NY | 11530 | 516 |
| Strathmore, NY | 11030 | 516 |
| Syosset, NY | 11773 | 516 |
| 11791 | 516 | |
| The Terrace, NY | 11050 | 516 |
| Thomaston, NY | 11021 | 516 |
| Uniondale, NY | 11553 | 516 |
| 11555 | 516 | |
| 11556 | 516 | |
| University Gardens, NY | 11020 | 516 |
| Upper Brookville, NY | 11545 | 516 |
| 11732 | 516 | |
| 11771 | 516 | |
| Usmma, NY | 11024 | 516 |
| Valley Stream, NY | 11580 | 516 |
| 11581 | 516 | |
| 11582 | 516 | |
| Wantagh, NY | 11793 | 516 |
| West Hempstead, NY | 11552 | 516 |
| Westbury, NY | 11568 | 516 |
| 11590 | 516 | |
| 11594 | 516 | |
| 11597 | 516 | |
| Williston Park, NY | 11596 | 516 |
| Woodbury, NY | 11797 | 516 |
| Woodmere, NY | 11598 | 516 |
| Woodsburgh, NY | 11598 | 516 |