Nassau County, New York

Nassau County profile, demographic data, and geographic information.

Local Government & Public Administration

Authoritative general-purpose local government units serving this area U.S. Census Bureau GUS (2026) / GMAF

Government Unit	Unit Type	Jurisdiction Role	Contact / Address
COUNTY OF NASSAU GUS Population: 1,392,438 (2024) ID: 170425	County	Official County Government	Contact: COUNTY EXECUTIVE 1550 FRANKLIN AVE, MINEOLA NY 11501-4820
TOWN OF HEMPSTEAD GUS Population: 792,341 (2024) ID: 170895	Township	Municipal Government Within County	Contact: DIRECTOR DEPT OF HUMAN RESOURCES 1 WASHINGTON ST, HEMPSTEAD NY 11550-4923
TOWN OF OYSTER BAY GUS Population: 299,540 (2024) ID: 170896	Township	Municipal Government Within County	Contact: PUBLIC INFORMATION OFFICER 54 AUDREY AVE, OYSTER BAY NY 11771-1593
TOWN OF NORTH HEMPSTEAD GUS Population: 237,692 (2024) ID: 131387	Township	Municipal Government Within County	Contact: DIRECTOR, OFFICE OF INTERMUNICIPAL C 220 PLANDOME RD, MANHASSET NY 11030-2399
VILLAGE OF HEMPSTEAD GUS Population: 59,569 (2024) ID: 170546	Municipal	Municipal Government Within County	Contact: VILLAGE TREASURER 99 NICHOLS CT, HEMPSTEAD NY 11550-3166
VILLAGE OF FREEPORT GUS Population: 44,028 (2024) ID: 109521	Municipal	Municipal Government Within County	Contact: VILLAGE MAYOR 46 N OCEAN AVE, FREEPORT NY 11520-3023
VILLAGE OF VALLEY STREAM GUS Population: 40,232 (2024) ID: 131254	Municipal	Municipal Government Within County	Contact: ENGINEER 123 S CENTRAL AVE, VALLEY STREAM NY 11580-5413
CITY OF LONG BEACH GUS Population: 34,777 (2024) ID: 131248	Municipal	Municipal Government Within County	Contact: CITY MANAGER 1 W CHESTER ST, LONG BEACH NY 11561-2001
CITY OF GLEN COVE GUS Population: 28,088 (2024) ID: 170543	Municipal	Municipal Government Within County	Contact: CITY CLERK 9 GLEN ST, GLEN COVE NY 11542-2770
VILLAGE OF ROCKVILLE CENTRE GUS Population: 25,718 (2024) ID: 186644	Municipal	Municipal Government Within County	Contact: ADMINISTRATOR KATHLEEN MURRAY 1 COLLEGE PLACE, ROCKVILLE CENTRE NY 11570-4125
VILLAGE OF GARDEN CITY GUS Population: 22,993 (2024) ID: 131244	Municipal	Municipal Government Within County	Contact: VILLAGE AUDITOR 351 STEWART AVE, GARDEN CITY NY 11530-4529
VILLAGE OF MINEOLA GUS Population: 21,305 (2024) ID: 170556	Municipal	Municipal Government Within County	Contact: VILLAGE MAYOR 155 WASHINGTON AVE, MINEOLA NY 11501-2410
VILLAGE OF LYNBROOK GUS Population: 20,684 (2024) ID: 109525	Municipal	Municipal Government Within County	Contact: VILLAGE ADMINISTRATOR PO BOX 7021, LYNBROOK NY 11563-7021
VILLAGE OF MASSAPEQUA PARK GUS Population: 16,922 (2024) ID: 170555	Municipal	Municipal Government Within County	Contact: ADMINISTRATOR 151 FRONT ST, MASSAPEQUA PARK NY 11762-2720
VILLAGE OF FLORAL PARK GUS Population: 15,966 (2024) ID: 170542	Municipal	Municipal Government Within County	Contact: ADMINISTRATOR 1 FLORAL BLVD, FLORAL PARK NY 11001-2722
VILLAGE OF WESTBURY GUS Population: 15,871 (2024) ID: 109528	Municipal	Municipal Government Within County	Contact: ADMINISTRATOR 235 LINCOLN PL, WESTBURY NY 11590-3295
VILLAGE OF GREAT NECK GUS Population: 11,075 (2024) ID: 170544	Municipal	Municipal Government Within County	Contact: VILLAGE MAYOR 61 BAKER HILL RD, GREAT NECK NY 11023-1510
VILLAGE OF NEW HYDE PARK GUS Population: 10,220 (2024) ID: 194803	Municipal	Municipal Government Within County	Contact: VILLAGE MAYOR 1420 JERICHO TPKE, FL 1, NEW HYDE PARK NY 11040-4684
VILLAGE OF EAST ROCKAWAY GUS Population: 10,064 (2024) ID: 131243	Municipal	Municipal Government Within County	Contact: VILLAGE CLERK TREASURER PO BOX 189, EAST ROCKAWAY NY 11518-0189
VILLAGE OF FARMINGDALE GUS Population: 8,553 (2024) ID: 170541	Municipal	Municipal Government Within County	Contact: DEPUTY CLERK-TREASURER 361 MAIN ST, FARMINGDALE NY 11735-3567
VILLAGE OF MALVERNE GUS Population: 8,464 (2024) ID: 170553	Municipal	Municipal Government Within County	Contact: VILLAGE MAYOR 99 CHURCH ST, MALVERNE NY 11565-1726
VILLAGE OF GREAT NECK PLAZA GUS Population: 7,824 (2024) ID: 170545	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 220440, GREAT NECK NY 11022-0440
VILLAGE OF WILLISTON PARK GUS Population: 7,503 (2024) ID: 170567	Municipal	Municipal Government Within County	Contact: CLERK 494 WILLIS AVE, WILLISTON PARK NY 11596-1787
VILLAGE OF CEDARHURST GUS Population: 7,324 (2024) ID: 170539	Municipal	Municipal Government Within County	Contact: VILLAGE CLERK-TREASURER 200 CEDARHURST AVE, CEDARHURST NY 11516-1600
VILLAGE OF EAST HILLS GUS Population: 7,295 (2024) ID: 208831	Municipal	Municipal Government Within County	Contact: VILLAGE MAYOR 209 HARBOR HILL RD, ROSLYN NY 11576-2326
VILLAGE OF MANORHAVEN GUS Population: 6,997 (2024) ID: 170554	Municipal	Municipal Government Within County	Contact: BUILDING DEPARTMENT 33 MANORHAVEN BLVD, PORT WASHINGTON NY 11050-1609
VILLAGE OF LAWRENCE GUS Population: 6,807 (2024) ID: 170552	Municipal	Municipal Government Within County	Contact: VILLAGE ADMINISTRATOR 196 CENTRAL AVE, STE A, LAWRENCE NY 11559-1400
VILLAGE OF BAYVILLE GUS Population: 6,739 (2024) ID: 131242	Municipal	Municipal Government Within County	Contact: MAYOR 34 SCHOOL ST, UNIT A, BAYVILLE NY 11709-1955
VILLAGE OF KINGS POINT GUS Population: 5,680 (2024) ID: 170550	Municipal	Municipal Government Within County	Contact: VILLAGE CLERK TREASURER 32 STEPPING STONE LN, KINGS POINT NY 11024-1314
VILLAGE OF NORTH HILLS GUS Population: 5,427 (2024) ID: 170558	Municipal	Municipal Government Within County	Contact: ADMINISTRATOR 1 SHELTER ROCK RD, ROSLYN NY 11576-3130
VILLAGE OF SEA CLIFF GUS Population: 5,024 (2024) ID: 109527	Municipal	Municipal Government Within County	Contact: CLERK TREAS PO BOX 340, SEA CLIFF NY 11579-0340
VILLAGE OF ISLAND PARK GUS Population: 5,019 (2024) ID: 170548	Municipal	Municipal Government Within County	Contact: VILLAGE CLERK 127 LONG BEACH RD, ISLAND PARK NY 11558-1442
VILLAGE OF OLD WESTBURY GUS Population: 4,950 (2024) ID: 131250	Municipal	Municipal Government Within County	Contact: VILLAGE ADMINISTRATOR 1 STORE HILL RD, UNIT A, OLD WESTBURY NY 11568-1233
VILLAGE OF FLOWER HILL GUS Population: 4,836 (2024) ID: 208832	Municipal	Municipal Government Within County	Contact: VILLAGE ADMINISTRATOR 1 BONNIE HEIGHTS RD, MANHASSET NY 11030-1620
VILLAGE OF MUTTONTOWN GUS Population: 3,528 (2024) ID: 131249	Municipal	Municipal Government Within County	Contact: LISA LOLIS 1 RAZ TAFURO WAY, MUTTONTOWN NY 11791-9679
VILLAGE OF PORT WASHINGTON NORTH GUS Population: 3,146 (2024) ID: 131251	Municipal	Municipal Government Within County	Contact: VILLAGE CLERK 3 PLEASANT AVE, PORT WASHINGTON NY 11050
VILLAGE OF GREAT NECK ESTATES GUS Population: 3,117 (2024) ID: 131245	Municipal	Municipal Government Within County	Contact: ADMINISTRATOR 4 GATEWAY DR, GREAT NECK NY 11021-1950
VILLAGE OF ROSLYN GUS Population: 3,022 (2024) ID: 170562	Municipal	Municipal Government Within County	Contact: VILLAGE CLERK/TREASURER 1200 OLD NORTHERN BLVD, ROSLYN NY 11576-2172
VILLAGE OF BROOKVILLE GUS Population: 2,924 (2024) ID: 208830	Municipal	Municipal Government Within County	Contact: CLERK / TREASURER 18 HORSE HILL RD, GLEN HEAD NY 11545
VILLAGE OF LAKE SUCCESS GUS Population: 2,830 (2024) ID: 131247	Municipal	Municipal Government Within County	Contact: VILLAGE MAYOR 318 LAKEVILLE RD, GREAT NECK NY 11020-1638
VILLAGE OF MUNSEY PARK GUS Population: 2,778 (2024) ID: 170557	Municipal	Municipal Government Within County	Contact: VILLAGE CLERK/TREASURER 1777 NORTHERN BLVD, MANHASSET NY 11030-3501
VILLAGE OF SANDS POINT GUS Population: 2,743 (2024) ID: 131253	Municipal	Municipal Government Within County	Contact: VILLAGE MAYOR PO BOX 188, PORT WASHINGTON NY 11050-0109
VILLAGE OF THOMASTON GUS Population: 2,732 (2024) ID: 170566	Municipal	Municipal Government Within County	Contact: VILLAGE ADMINISTRATOR, VILLAGE OF TH 100 E SHORE RD, GREAT NECK NY 11023-2408
VILLAGE OF EAST WILLISTON GUS Population: 2,613 (2024) ID: 170540	Municipal	Municipal Government Within County	Contact: VILLAGE MAYOR 2 PROSPECT ST, EAST WILLISTON NY 11596-2498
VILLAGE OF OYSTER BAY COVE GUS Population: 2,257 (2024) ID: 170559	Municipal	Municipal Government Within County	Contact: VILLAGE CLERK/TREASURER PO BOX 66, OYSTER BAY NY 11771
VILLAGE OF OLD BROOKVILLE GUS Population: 2,100 (2024) ID: 109526	Municipal	Municipal Government Within County	Contact: VILLAGE CLERK 201 MCCOUNS LN, GLEN HEAD NY 11545-2529
VILLAGE OF LAUREL HOLLOW GUS Population: 1,945 (2024) ID: 170551	Municipal	Municipal Government Within County	Contact: CLERK / TREASURER 1492 LAUREL HOLLOW RD, SYOSSET NY 11791-9633
VILLAGE OF STEWART MANOR GUS Population: 1,919 (2024) ID: 193769	Municipal	Municipal Government Within County	Contact: VILLAGE OF STEWART MANOR 120 COVERT AVE, STEWART MANOR NY 11530-4914
VILLAGE OF LATTINGTOWN GUS Population: 1,875 (2024) ID: 109523	Municipal	Municipal Government Within County	Contact: CLERK TREASURER PO BOX 488, LOCUST VALLEY NY 11560-0488
VILLAGE OF UPPER BROOKVILLE GUS Population: 1,771 (2024) ID: 208835	Municipal	Municipal Government Within County	Contact: CLERK/TREASURER PO BOX 548, OYSTER BAY NY 11771-0548