| Official Name: | Holly Oak, Delaware |
| Pushpin Map: | Delaware#USA |
| Pushpin Label: | Holly Oak |
| Pushpin Label Position: | left |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Delaware |
| Subdivision Type2: | County |
| Subdivision Name2: | New Castle |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 79 |
| Coordinates: | 39.7883°N -75.4789°W |
| Area Code: | 302 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 214109 |
Holly Oak is an unincorporated town in New Castle County, Delaware, United States.[1] [2] [3] Holly Oak is located northwest of U.S. Route 13 Business between Silverside Road and Harvey Road to the northeast of Wilmington and southwest of Claymont. It was once served by the Philadelphia, Wilmington and Baltimore Railroad. Perkins Run, a Delaware River tributary, mouths at Holly Oak.