Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Northeast Elementary School | School | | Suffolk | 40 47 47 N | 073 14 34 W |
| Brentwood Country Club | Locale | 28 | Suffolk | 40 47 13 N | 073 14 33 W |
| Ross Sanatorium | Hospital | 26 | Suffolk | 40 46 58 N | 073 14 31 W |
| Southside Hospital | Hospital | 3 | Suffolk | 40 43 34 N | 073 14 29 W |
| Saint Annes School | School | 24 | Suffolk | 40 46 38 N | 073 14 29 W |
| Bay Shore Marina | Locale | 3 | Suffolk | 40 42 43 N | 073 14 27 W |
| Academy of Saint Joseph | School | 23 | Suffolk | 40 46 22 N | 073 14 26 W |
| Kings Park High School | School | 49 | Suffolk | 40 53 01 N | 073 14 26 W |
| Calvary Cemetery | Cemetery | 19 | Suffolk | 40 45 55 N | 073 14 23 W |
| Kings Park State Hospital | Hospital | 32 | Suffolk | 40 53 45 N | 073 14 22 W |
| Saint Johnland Childrens Home | Building | 21 | Suffolk | 40 54 11 N | 073 14 22 W |
| San Remo Elementary School | School | 39 | Suffolk | 40 53 23 N | 073 14 21 W |
| Watchogue Creek | Stream | | Suffolk | 40 42 48 N | 073 14 19 W |
| Bull Ditch | Canal | 0 | Suffolk | 40 43 16 N | 073 14 19 W |
| Accompsett Elementary School | School | | Suffolk | 40 51 46 N | 073 14 16 W |
| Saint Patricks Cemetery | Cemetery | 8 | Suffolk | 40 44 09 N | 073 14 11 W |
| Penataquit Creek | Stream | | Suffolk | 40 42 45 N | 073 14 10 W |
| Head of the River School | School | 32 | Suffolk | 40 51 02 N | 073 14 09 W |
| Penataquit Point | Cape | 0 | Suffolk | 40 42 48 N | 073 14 08 W |
| Honey Hollow School | School | 19 | Suffolk | 40 49 20 N | 073 14 06 W |
| Parkview Elementary School | School | 46 | Suffolk | 40 52 34 N | 073 14 06 W |
| Oakwood Cemetery | Cemetery | 7 | Suffolk | 40 44 01 N | 073 14 05 W |
| Interchange 55 | Crossing | 36 | Suffolk | 40 48 24 N | 073 14 03 W |
| Sunken Meadow Creek | Stream | | Suffolk | 40 54 23 N | 073 14 01 W |
| East Middle School | School | | Suffolk | 40 46 56 N | 073 14 01 W |
| Great Cove | Bay | -3 | Suffolk | 40 42 32 N | 073 13 58 W |
| Awixa Creek | Stream | | Suffolk | 40 43 04 N | 073 13 57 W |
| East Brentwood | Populated Place | 26 | Suffolk | 40 47 31 N | 073 13 52 W |
| East Elementary School | School | | Suffolk | 40 46 56 N | 073 13 52 W |
| Nissequogue River | Stream | | Suffolk | 40 54 15 N | 073 13 48 W |
| Laurel Park Elementary School | School | | Suffolk | 40 45 41 N | 073 13 48 W |
| Orowoc Point | Cape | | Suffolk | 40 43 00 N | 073 13 47 W |
| Sexton Island | Island | 1 | Suffolk | 40 39 01 N | 073 13 46 W |
| Webster Pond | Lake | 7 | Suffolk | 40 50 54 N | 073 13 45 W |
| Montfort Seminary | School | 2 | Suffolk | 40 43 27 N | 073 13 43 W |
| Caleb Smith State Park | Park | | Suffolk | 40 50 41 N | 073 13 43 W |
| Southeast Elementary School | School | | Suffolk | 40 45 57 N | 073 13 43 W |
| Loretta Park Elementary School | School | | Suffolk | 40 45 38 N | 073 13 42 W |
| New Millpond | Reservoir | 6 | Suffolk | 40 50 32 N | 073 13 40 W |
| Harrison Pond Park | Park | | Suffolk | 40 53 32 N | 073 13 40 W |
| Vail Pond | Lake | 5 | Suffolk | 40 50 52 N | 073 13 37 W |
| Willow Pond | Lake | 8 | Suffolk | 40 51 05 N | 073 13 37 W |
| Orowoc Creek | Stream | | Suffolk | 40 42 56 N | 073 13 33 W |
| H Lee Dennison Building | Building | | Suffolk | 40 49 17 N | 073 13 29 W |
| Orowoc Lake | Lake | 2 | Suffolk | 40 43 45 N | 073 13 28 W |
| Short Beach | Beach | 0 | Suffolk | 40 54 26 N | 073 13 27 W |
| Saint John's Episcopal Hospital | Hospital | | Suffolk | 40 52 05 N | 073 13 25 W |
| Islip Middle School | School | | Suffolk | 40 43 44 N | 073 13 23 W |
| West Canal | Canal | 0 | Suffolk | 40 42 36 N | 073 13 17 W |
| Blydenburgh Park | Park | | Suffolk | 40 50 14 N | 073 13 17 W |
| Saint Johns Episcopal Hospital Heliport | Airport | 39 | Suffolk | 40 52 10 N | 073 13 16 W |
| Commack Road Elementary School | School | 9 | Suffolk | 40 44 42 N | 073 13 16 W |
| Bayberry Point | Cape | 0 | Suffolk | 40 42 26 N | 073 13 15 W |
| San Remo | Populated Place | 49 | Suffolk | 40 52 55 N | 073 13 14 W |
| Islip High School | School | 3 | Suffolk | 40 43 50 N | 073 13 13 W |
| Bill Richards Memorial Park | Park | | Suffolk | 40 49 33 N | 073 13 13 W |
| West Channel | Channel | -3 | Suffolk | 40 40 29 N | 073 13 12 W |
| Saint Anthonys High School | School | 36 | Suffolk | 40 53 20 N | 073 13 12 W |
| Pardees Ponds | Lake | 3 | Suffolk | 40 43 51 N | 073 13 08 W |
| Middle Canal | Canal | 0 | Suffolk | 40 42 31 N | 073 13 07 W |
| Fire Island Lighthouse Visitors Center | Building | | Suffolk | 40 37 56 N | 073 13 07 W |
| Islip Post Office | Post Office | | Suffolk | 40 43 42 N | 073 13 05 W |
| Interchange 56 | Crossing | 30 | Suffolk | 40 48 32 N | 073 13 01 W |
| Town of Smithtown | Civil | 32 | Suffolk | 40 52 13 N | 073 13 01 W |
| Hauppauge Country Club | Locale | | Suffolk | 40 49 41 N | 073 13 01 W |
| Forestwood Park | Park | 14 | Suffolk | 40 50 39 N | 073 13 00 W |
| Main Street School | School | 3 | Suffolk | 40 43 45 N | 073 12 59 W |
| NMY | Tower | 1 | Suffolk | 40 37 55 N | 073 12 57 W |
| East Canal | Canal | 0 | Suffolk | 40 42 29 N | 073 12 57 W |
| Bayberry Yacht Club | Locale | | Suffolk | 40 42 22 N | 073 12 56 W |
| Phillips Millpond | Lake | 1 | Suffolk | 40 51 22 N | 073 12 55 W |
| Maude S Sherwood Elementary School | School | 2 | Suffolk | 40 43 08 N | 073 12 53 W |
| Town Beach | Beach | 0 | Suffolk | 40 42 21 N | 073 12 52 W |
| Nissequogue Point Beach Club | Locale | 7 | Suffolk | 40 54 31 N | 073 12 51 W |
| WLIX-AM (Islip) | Tower | 8 | Suffolk | 40 45 04 N | 073 12 50 W |
| Northeast Branch | Stream | | Suffolk | 40 50 29 N | 073 12 49 W |
| Landing School | School | 40 | Suffolk | 40 52 15 N | 073 12 49 W |
| Islip Public Library | Building | | Suffolk | 40 43 36 N | 073 12 49 W |
| Farm Shoals | Bar | 0 | Suffolk | 40 38 29 N | 073 12 46 W |
| Islip Speedway | Locale | 9 | Suffolk | 40 45 02 N | 073 12 41 W |
| Weld Park | Park | 18 | Suffolk | 40 50 18 N | 073 12 40 W |
| Seatuck National Wildlife Refuge | Park | | Suffolk | 40 42 37 N | 073 12 40 W |
| Forest Brook Elementary School | School | | Suffolk | 40 50 02 N | 073 12 39 W |
| Islip | Populated Place | 4 | Suffolk | 40 43 47 N | 073 12 37 W |
| Islip School | School | 7 | Suffolk | 40 44 27 N | 073 12 36 W |
| Sweetbriar School | School | 19 | Suffolk | 40 50 59 N | 073 12 34 W |
| Saint Johns Cemetery | Cemetery | 36 | Suffolk | 40 48 10 N | 073 12 33 W |
| Interchange 43 | Crossing | 16 | Suffolk | 40 45 19 N | 073 12 32 W |
| Landing Cemetery | Cemetery | 24 | Suffolk | 40 52 31 N | 073 12 32 W |
| Islip Station | Locale | | Suffolk | 40 44 09 N | 073 12 32 W |
| Central Islip Senior High School | School | | Suffolk | 40 47 52 N | 073 12 24 W |
| Bretton Woods Elementary School | School | | Suffolk | 40 48 47 N | 073 12 21 W |
| Wheeler Road School | School | 28 | Suffolk | 40 47 34 N | 073 12 17 W |
| Cordello Avenue Elementary School | School | | Suffolk | 40 47 02 N | 073 12 17 W |
| Champlin Creek | Stream | | Suffolk | 40 42 36 N | 073 12 16 W |
| Smithtown Landing Municipal Golf Course | Locale | 9 | Suffolk | 40 53 12 N | 073 12 15 W |
| Central Islip Station | Locale | | Suffolk | 40 47 24 N | 073 12 14 W |
| Kismet | Populated Place | 1 | Suffolk | 40 38 03 N | 073 12 12 W |
| Lower Winganhauppauge Lake | Lake | 0 | Suffolk | 40 43 33 N | 073 12 10 W |
| Hauppauge | Populated Place | 19 | Suffolk | 40 49 32 N | 073 12 09 W |
| Upper Winganhauppauge Lake | Lake | 2 | Suffolk | 40 43 43 N | 073 12 08 W |
| Episcopal Church of the Messiah | Church | | Suffolk | 40 47 20 N | 073 12 08 W |
| Central Islip | Populated Place | 26 | Suffolk | 40 47 26 N | 073 12 06 W |
| Hauppauge High School | School | | Suffolk | 40 49 21 N | 073 12 05 W |
| Knapps Lake | Lake | 2 | Suffolk | 40 43 57 N | 073 12 04 W |
| Saint John of God Roman Catholic Church | Church | | Suffolk | 40 47 12 N | 073 12 04 W |
| Smithtown | Populated Place | 18 | Suffolk | 40 51 21 N | 073 12 02 W |
| Hewlett School of East Islip | School | 4 | Suffolk | 40 43 32 N | 073 12 01 W |
| Our Lady of Providence Regional School | School | | Suffolk | 40 47 13 N | 073 12 01 W |
| Hospital of West Suffolk | Hospital | | Suffolk | 40 49 50 N | 073 12 00 W |