Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Davidson Marsh | Swamp | 1 | Sussex | 38 48 12 N | 075 14 16 W |
| Davis Cemetery | Cemetery | 3 | Sussex | 38 51 05 N | 075 18 43 W |
| Davis Corner | Populated Place | 22 | Kent | 39 09 55 N | 075 40 54 W |
| Davis Landing | Locale | 1 | Sussex | 38 54 02 N | 075 20 10 W |
| Davis Pond Dam | Dam | 12 | Sussex | 38 30 55 N | 075 27 38 W |
| Dayett Station | Locale | 19 | New Castle | 39 38 00 N | 075 43 39 W |
| De Lar Ware High School | School | 17 | New Castle | 39 41 50 N | 075 33 30 W |
| Deacons Walk | Populated Place | 56 | New Castle | 39 43 30 N | 075 42 59 W |
| Deakyneville | Populated Place | 4 | New Castle | 39 22 09 N | 075 32 40 W |
| Deans Hole | Bay | -3 | Sussex | 38 35 05 N | 075 11 03 W |
| Deauville Beach | Locale | 3 | Sussex | 38 43 34 N | 075 04 41 W |
| Deemers Beach | Beach | -2 | New Castle | 39 39 08 N | 075 34 60 W |
| Deemers Beach | Beach | 2 | New Castle | 39 38 28 N | 075 35 44 W |
| Deep Branch | Stream | | Sussex | 38 38 48 N | 075 18 46 W |
| Deep Branch | Stream | | Sussex | 38 54 59 N | 075 24 33 W |
| Deep Branch | Stream | | Sussex | 38 48 47 N | 075 16 48 W |
| Deep Branch Farm | Populated Place | 16 | New Castle | 39 25 33 N | 075 42 37 W |
| Deep Creek | Stream | | New Castle | 39 26 20 N | 075 40 44 W |
| Deep Creek | Stream | | Sussex | 38 38 39 N | 075 35 18 W |
| Deep Gully Ditch | Canal | 10 | Sussex | 38 38 17 N | 075 31 07 W |
| Deep Hole | Bay | -7 | Sussex | 38 35 14 N | 075 14 14 W |
| Deep Hole Branch | Stream | | Sussex | 38 31 54 N | 075 11 52 W |
| Deep Hole Ditch | Canal | 3 | Sussex | 38 32 15 N | 075 06 49 W |
| Deepwater Point | Cape | -4 | Kent | 39 12 03 N | 075 23 28 W |
| Deepwater Point Range | Channel | -3 | New Castle | 39 39 00 N | 075 32 59 W |
| Deer Creek | Populated Place | 14 | Sussex | 38 47 30 N | 075 35 25 W |
| Deer Run | Populated Place | 18 | New Castle | 39 38 40 N | 075 42 54 W |
| Deerhurst | Populated Place | 95 | New Castle | 39 47 00 N | 075 32 29 W |
| Deerwood | Populated Place | 12 | Sussex | 38 43 14 N | 075 18 01 W |
| Del Haven Estates | Populated Place | 11 | Kent | 39 03 15 N | 075 30 02 W |
| Del Haven Estates | Populated Place | 10 | Kent | 39 03 21 N | 075 30 03 W |
| Del Shire | Populated Place | 12 | Kent | 39 12 33 N | 075 33 54 W |
| Delaire | Populated Place | 24 | New Castle | 39 46 30 N | 075 29 14 W |
| Delamore Park | Park | 21 | New Castle | 39 44 24 N | 075 34 07 W |
| Delaney Corner | Populated Place | 18 | New Castle | 39 17 57 N | 075 44 50 W |
| Delaneys Methodist Church | Church | 20 | New Castle | 39 17 55 N | 075 44 49 W |
| Delaplane Manor | Populated Place | 22 | New Castle | 39 41 46 N | 075 42 32 W |
| Delaware Airpark | Airport | 15 | Kent | 39 13 04 N | 075 35 48 W |
| Delaware Bay | Bay | -11 | Sussex | 39 03 00 N | 075 08 59 W |
| Delaware City | Populated Place | 1 | New Castle | 39 34 40 N | 075 35 20 W |
| Delaware City Branch Channel | Canal | 0 | New Castle | 39 34 09 N | 075 35 25 W |
| Delaware City Elementary School | School | 2 | New Castle | 39 34 19 N | 075 35 34 W |
| Delaware City Presbyterian Church | Church | 4 | New Castle | 39 34 31 N | 075 35 36 W |
| Delaware Colony State Training School | School | 9 | Sussex | 38 37 22 N | 075 19 10 W |
| Delaware Corporate Center | Locale | 122 | New Castle | 39 48 44 N | 075 33 11 W |
| Delaware Correctional Center | Locale | 15 | New Castle | 39 20 09 N | 075 36 11 W |
| Delaware Department of Transportation Maintenance Area | Area | 15 | Kent | 38 56 02 N | 075 33 43 W |
| Delaware Heights | Populated Place | 122 | New Castle | 39 49 30 N | 075 37 14 W |
| Delaware Industrial Park | Locale | 21 | New Castle | 39 39 05 N | 075 43 49 W |
| Delaware International Raceway | Locale | 15 | Sussex | 38 28 08 N | 075 33 40 W |
| Delaware Junction | Populated Place | 3 | New Castle | 39 43 23 N | 075 34 36 W |
| Delaware Learning Center | School | 68 | New Castle | 39 45 53 N | 075 34 39 W |
| Delaware Memorial Bridges | Bridge | -69 | New Castle | 39 41 21 N | 075 31 07 W |
| Delaware Motor Club | Locale | 20 | New Castle | 39 42 54 N | 075 40 16 W |
| Delaware Museum Airport | Airport | 93 | New Castle | 39 47 33 N | 075 36 49 W |
| Delaware Park Race Track | Locale | 10 | New Castle | 39 42 11 N | 075 40 05 W |
| Delaware Point | Cape | 1 | New Castle | 39 22 39 N | 075 30 56 W |
| Delaware Preschool Association | School | 92 | New Castle | 39 47 51 N | 075 31 29 W |
| Delaware River | Stream | | New Castle | 39 25 57 N | 075 31 44 W |
| Delaware River and Bay Monument | Locale | -7 | New Castle | 39 25 03 N | 075 32 24 W |
| Delaware Seashore State Park | Park | 4 | Sussex | 38 39 00 N | 075 03 59 W |
| Delaware State College | School | 10 | Kent | 39 11 08 N | 075 32 39 W |
| Delaware State College Farm | Locale | 15 | Kent | 39 12 57 N | 075 37 44 W |
| Delaware State Fairgrounds | Locale | 18 | Kent | 38 54 50 N | 075 34 30 W |
| Delaware State Fire School | School | 11 | Kent | 39 10 22 N | 075 35 30 W |
| Delaware State Hospital | Hospital | 17 | New Castle | 39 36 54 N | 075 39 36 W |
| Delaware State Hospital | Hospital | 8 | New Castle | 39 42 31 N | 075 34 38 W |
| Delaware State Police Academy | School | 12 | Kent | 39 11 38 N | 075 32 43 W |
| Delaware State Police Academy Heliport | Airport | 12 | Kent | 39 11 37 N | 075 32 36 W |
| Delaware Technical and Community College | School | 9 | Kent | 39 11 41 N | 075 33 25 W |
| Delaware Technical and Community College | School | 15 | Sussex | 38 41 51 N | 075 24 21 W |
| Delaware Veterans Memorial Cemetery | Cemetery | 22 | New Castle | 39 32 59 N | 075 44 36 W |
| Delcastle Technical High School | School | 22 | New Castle | 39 43 36 N | 075 37 36 W |
| Delmar | Populated Place | 15 | Sussex | 38 27 23 N | 075 34 38 W |
| Delmar Junior-Senior High School | School | 15 | Sussex | 38 27 28 N | 075 34 04 W |
| Delmar State Line Airport | Airport | 15 | Sussex | 38 27 35 N | 075 33 31 W |
| Delmarva Camp (historical) | Locale | 12 | Sussex | 38 35 14 N | 075 34 54 W |
| Delmarva Christian Camp | Locale | 11 | Sussex | 38 31 58 N | 075 29 01 W |
| Delmarva Peninsula | Cape | 13 | Sussex | 38 30 00 N | 075 29 59 W |
| Delmarva Raceway | Locale | 13 | Sussex | 38 42 16 N | 075 21 39 W |
| Delpark Manor | Populated Place | 18 | New Castle | 39 43 00 N | 075 39 29 W |
| Delpro Company | Locale | 23 | New Castle | 39 36 27 N | 075 41 60 W |
| Delshire | Populated Place | 12 | Kent | 39 12 28 N | 075 33 45 W |
| Delwoods | Populated Place | 87 | New Castle | 39 46 48 N | 075 32 09 W |
| Delwynn (subdivision) | Populated Place | 105 | New Castle | 39 48 25 N | 075 32 03 W |
| Denton Manor | Populated Place | 3 | Sussex | 38 33 25 N | 075 06 19 W |
| Denton Mills | Populated Place | 3 | Sussex | 38 32 47 N | 075 07 01 W |
| Denton Woods Mobile Home Park | Populated Place | 1 | Sussex | 38 33 47 N | 075 06 14 W |
| Derby Pond | Reservoir | 10 | Kent | 39 05 08 N | 075 33 31 W |
| Derby Pond Dam | Dam | 10 | Kent | 39 05 08 N | 075 33 31 W |
| Derby Shores | Populated Place | 16 | Kent | 39 05 11 N | 075 34 11 W |
| Derickson Point | Cape | 0 | Sussex | 38 34 04 N | 075 11 38 W |
| Derrickson Ditch | Stream | | Sussex | 38 33 03 N | 075 06 10 W |
| Derrickson Point | Cape | -3 | Sussex | 38 34 35 N | 075 05 41 W |
| Devers Gut | Gut | 0 | Kent | 39 14 11 N | 075 26 59 W |
| Devils Woodyard | Woods | 16 | Kent | 38 50 17 N | 075 34 13 W |
| Devious Branch | Stream | | Kent | 39 12 30 N | 075 30 36 W |
| Devon | Populated Place | 123 | New Castle | 39 49 40 N | 075 32 24 W |
| Devon | Populated Place | 32 | New Castle | 39 40 00 N | 075 46 04 W |
| Devon Park | Park | 32 | New Castle | 39 39 57 N | 075 46 06 W |
| Devonshire | Populated Place | 119 | New Castle | 39 49 30 N | 075 32 24 W |
| Devonshire Park | Park | 119 | New Castle | 39 49 20 N | 075 32 19 W |
| Devonshire Woods | Populated Place | 11 | Sussex | 38 39 47 N | 075 38 13 W |
| Dewey Beach | Populated Place | 2 | Sussex | 38 41 34 N | 075 04 29 W |
| Dewey Beach Post Office (historical) | Post Office | 2 | Sussex | 38 41 34 N | 075 04 29 W |
| Dexter Corners | Populated Place | 21 | New Castle | 39 20 04 N | 075 41 59 W |
| Diamond Pond | Reservoir | 6 | Sussex | 38 46 07 N | 075 19 04 W |
| Diamond Pond Dam (historical) | Dam | 6 | Sussex | 38 46 07 N | 075 19 04 W |
| Diamond State Industrial Park | Locale | 21 | New Castle | 39 38 55 N | 075 44 24 W |
| Dickerson Chapel American Methodist Episcopal Church | Church | 8 | Sussex | 38 34 09 N | 075 16 51 W |