Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Bible Vision Church of God | Church | | Nassau | 40 42 11 N | 073 36 13 W |
| Big Crow Island | Island | 0 | Nassau | 40 37 21 N | 073 32 34 W |
| Big Hassock | Island | 1 | Nassau | 40 36 23 N | 073 42 23 W |
| Bill of Rights Hall | Building | | Nassau | 40 42 59 N | 073 36 04 W |
| Biltmore Shores | Populated Place | 1 | Nassau | 40 39 49 N | 073 27 58 W |
| Birch Lane Elementary School | School | 3 | Nassau | 40 39 45 N | 073 27 11 W |
| Birch School | School | 3 | Nassau | 40 39 23 N | 073 33 36 W |
| Bird Grove | Populated Place | 8 | Nassau | 40 49 56 N | 073 45 18 W |
| Black Banks Island | Island | 0 | Nassau | 40 37 04 N | 073 28 53 W |
| Blessed Sacrament School | School | 8 | Nassau | 40 40 24 N | 073 42 31 W |
| Bligh Field | Park | 3 | Nassau | 40 39 06 N | 073 39 19 W |
| Blodgett Hall | Building | | Nassau | 40 43 14 N | 073 39 09 W |
| Bloomingdale School | School | 35 | Nassau | 40 44 52 N | 073 30 33 W |
| Boardman School | School | 0 | Nassau | 40 37 24 N | 073 37 45 W |
| Bowditch Hall | Building | | Nassau | 40 48 46 N | 073 45 42 W |
| Bowling Green School | School | 33 | Nassau | 40 44 38 N | 073 33 29 W |
| Brady Park | Park | 6 | Nassau | 40 40 41 N | 073 27 39 W |
| Bread Spring | Spring | 28 | Nassau | 40 44 05 N | 073 27 39 W |
| Breslin Hall | Building | | Nassau | 40 42 43 N | 073 36 02 W |
| Brickyard Point | Cape | 2 | Nassau | 40 53 10 N | 073 31 58 W |
| Brierley Park | Park | 18 | Nassau | 40 43 05 N | 073 37 09 W |
| Broad Channel | Channel | 0 | Nassau | 40 36 10 N | 073 40 48 W |
| Broad Creek Channel | Channel | -3 | Nassau | 40 37 20 N | 073 31 56 W |
| Broadlawn Harbor Yacht Club | Locale | | Nassau | 40 49 25 N | 073 43 35 W |
| Broadway Mall Shopping Center | Locale | | Nassau | 40 46 22 N | 073 31 54 W |
| Brook Road Park | Park | 2 | Nassau | 40 39 12 N | 073 43 16 W |
| Brooklyn Avenue Elementary School | School | | Nassau | 40 39 29 N | 073 41 56 W |
| Brooks Stadium | Park | | Nassau | 40 48 48 N | 073 45 30 W |
| Brookside Elementary School | School | 9 | Nassau | 40 40 08 N | 073 36 15 W |
| Brookside Junior High School | School | 12 | Nassau | 40 41 14 N | 073 34 08 W |
| Brookside Preserve | Park | | Nassau | 40 39 30 N | 073 36 09 W |
| Brookville | Populated Place | 72 | Nassau | 40 48 47 N | 073 34 02 W |
| Brookville Cemetery | Cemetery | 56 | Nassau | 40 49 50 N | 073 34 21 W |
| Brookville Country Club | Locale | 45 | Nassau | 40 50 32 N | 073 35 30 W |
| Brookville Nature Park | Park | | Nassau | 40 48 40 N | 073 32 43 W |
| Brookville Residence Hall | Building | | Nassau | 40 49 09 N | 073 35 28 W |
| Brookville School | School | 49 | Nassau | 40 50 08 N | 073 34 09 W |
| Brosewere Bay | Bay | 0 | Nassau | 40 36 36 N | 073 42 03 W |
| Brower Hall | Building | | Nassau | 40 42 50 N | 073 36 00 W |
| Buckley School | School | 54 | Nassau | 40 46 06 N | 073 40 38 W |
| Bulkhead Drain | Channel | -3 | Nassau | 40 37 38 N | 073 29 06 W |
| Burns Avenue School | School | 43 | Nassau | 40 46 10 N | 073 32 06 W |
| Bush Creek | Gut | 0 | Nassau | 40 37 11 N | 073 32 14 W |
| Butler Annex | Building | | Nassau | 40 42 47 N | 073 35 47 W |
| C V Starr Hall | Building | | Nassau | 40 42 51 N | 073 35 48 W |
| California Avenue School | School | 21 | Nassau | 40 42 38 N | 073 35 54 W |
| California Canal | Canal | 0 | Nassau | 40 35 57 N | 073 38 59 W |
| Calkins Hall | Building | | Nassau | 40 42 48 N | 073 36 00 W |
| Calvary Lutheran Church | Church | | Nassau | 40 43 24 N | 073 32 27 W |
| Calvary Protestant Church | Church | | Nassau | 40 38 29 N | 073 36 33 W |
| Cammanns Pond County Park | Park | 2 | Nassau | 40 39 12 N | 073 33 01 W |
| Camp Avenue School | School | 9 | Nassau | 40 40 37 N | 073 33 28 W |
| Camp Mills (historical) | Military (Historical) | 22 | Nassau | 40 43 41 N | 073 36 39 W |
| Campbell Park | Park | 16 | Nassau | 40 41 51 N | 073 37 34 W |
| Canal 10 | Canal | | Nassau | 40 39 17 N | 073 26 43 W |
| Canal 6 | Canal | | Nassau | 40 39 08 N | 073 25 53 W |
| Canal 7 | Canal | | Nassau | 40 39 11 N | 073 26 06 W |
| Canal 8 | Canal | | Nassau | 40 39 14 N | 073 26 19 W |
| Canal 9 | Canal | | Nassau | 40 39 18 N | 073 26 32 W |
| Cantiague Elementary School | School | 49 | Nassau | 40 46 41 N | 073 33 09 W |
| Cantiague Park | Park | 43 | Nassau | 40 46 16 N | 073 32 40 W |
| Carey High School | School | 20 | Nassau | 40 42 51 N | 073 40 03 W |
| Carle Place | Populated Place | 31 | Nassau | 40 45 09 N | 073 36 37 W |
| Carle Place Middle-Senior High School | School | | Nassau | 40 44 50 N | 073 33 56 W |
| Carle Place Park | Park | 32 | Nassau | 40 44 56 N | 073 36 07 W |
| Carman Creek | Stream | | Nassau | 40 39 25 N | 073 25 51 W |
| Carman Road School | School | 10 | Nassau | 40 41 30 N | 073 26 00 W |
| Carnegie Institute | School | 8 | Nassau | 40 51 31 N | 073 27 59 W |
| Caroline G Atkinson School | School | 9 | Nassau | 40 39 55 N | 073 35 26 W |
| Carpenter Neck | Cape | 39 | Nassau | 40 51 11 N | 073 38 26 W |
| Carpenter Point | Cape | 8 | Nassau | 40 50 37 N | 073 39 11 W |
| Carpenters Neck | Cape | | Nassau | 40 51 00 N | 073 38 29 W |
| Carrie Palmer Weber Middle School | School | 43 | Nassau | 40 49 41 N | 073 40 59 W |
| Cathedral of the Incarnation | Church | | Nassau | 40 43 16 N | 073 38 31 W |
| Cathedral School of Saint Mary | School | 26 | Nassau | 40 43 13 N | 073 38 24 W |
| Cauerbach Canal | Canal | 0 | Nassau | 40 37 45 N | 073 41 03 W |
| Cedar Creek | Stream | | Nassau | 40 38 46 N | 073 29 58 W |
| Cedar Island | Island | 0 | Nassau | 40 36 48 N | 073 40 43 W |
| Cedar Island Creek | Channel | 0 | Nassau | 40 36 35 N | 073 40 48 W |
| Cedar Island Marsh | Island | 0 | Nassau | 40 36 47 N | 073 40 58 W |
| Cedar Street School | School | 18 | Nassau | 40 42 16 N | 073 35 37 W |
| Cedar Swamp Creek | Stream | | Nassau | 40 38 30 N | 073 31 48 W |
| Cedarbrook Golf and Tennis Club | Locale | 46 | Nassau | 40 50 26 N | 073 36 17 W |
| Cedarhurst | Populated Place | 8 | Nassau | 40 37 22 N | 073 43 27 W |
| Cedarhurst Post Office | Post Office | | Nassau | 40 37 23 N | 073 43 27 W |
| Cedarhurst Station | Locale | | Nassau | 40 37 22 N | 073 43 32 W |
| Cedarhurst Yacht Club | Locale | 2 | Nassau | 40 35 38 N | 073 43 08 W |
| Centennial Avenue School | School | 12 | Nassau | 40 40 36 N | 073 35 37 W |
| Centennial Park | Park | | Nassau | 40 40 42 N | 073 35 19 W |
| Center Island | Island | 6 | Nassau | 40 54 16 N | 073 31 09 W |
| Center Street School | School | 34 | Nassau | 40 45 29 N | 073 39 23 W |
| Central Avenue Branch Massapequa Public Library | Building | | Nassau | 40 40 43 N | 073 28 19 W |
| Central Boulevard Elementary School | School | 30 | Nassau | 40 44 08 N | 073 29 15 W |
| Central Hebrew High School | School | | Nassau | 40 38 25 N | 073 37 56 W |
| Central Park Road School | School | 42 | Nassau | 40 46 22 N | 073 28 42 W |
| Central School | School | 0 | Nassau | 40 35 20 N | 073 40 08 W |
| Central Synagogue of Nassau County | Church | | Nassau | 40 40 15 N | 073 37 22 W |
| Centre Avenue Elementary School | School | | Nassau | 40 38 55 N | 073 39 50 W |
| Centre Avenue Station | Locale | | Nassau | 40 38 59 N | 073 39 55 W |
| Centre Island | Cape | 14 | Nassau | 40 54 00 N | 073 31 13 W |
| Centre Island | Populated Place | 10 | Nassau | 40 54 06 N | 073 31 11 W |
| Centre Island Beach | Beach | 0 | Nassau | 40 54 46 N | 073 31 57 W |
| Centre Island Police Station | Building | | Nassau | 40 54 05 N | 073 31 18 W |
| Centre Island Reef | Bar | 0 | Nassau | 40 55 03 N | 073 31 37 W |
| Centre Island Town Park | Park | | Nassau | 40 54 36 N | 073 32 03 W |
| Chaminade High School | School | 31 | Nassau | 40 44 40 N | 073 38 57 W |
| Chamsarant Korean Methodist Church | Church | | Nassau | 40 42 19 N | 073 37 60 W |
| Chapman Hall | Building | | Nassau | 40 43 11 N | 073 39 12 W |
| Charles Campagne School | School | 36 | Nassau | 40 45 28 N | 073 28 28 W |
| Charles E Schwarting School | School | 13 | Nassau | 40 41 32 N | 073 28 33 W |