Delaware’s 2010 primary election provided some major surprises in the statewide races, but a look further down the ballot shows incumbents and party endorsed candidates fared well. Hazel Plant in the 2nd State Representative district and New Castle County sheriff Mike Walsh were the only incumbents who failed to earn spots on the general election ballot in November. DELAWARE IN FACT has the entire election results:
* = Incumbent
| FEDERAL OFFICES |
| United States Senator (4 YR Term) | | | Michael N. Castle | 46.9 % |
| | | | Christine O'Donnell | 53.1 % |
| Representative in Congress | | | Rose Izzo | 3.7 % |
| | | | Michele Rollins | 47.7 % |
| | | | Glen Urquhart | 48.6 % |
| STATEWIDE OFFICES |
| State Treasurer | Chip Flowers | | | 54.3 % |
| | Velda Jones-Potter* | | | 45.7 % |
| Auditor of Accounts | Richard Korn | | | 53.9 % |
| | Kenneth A. Matlusky | | | 46.1 % |
| STATE SENATE |
| State Senator District 19 | | | Eric R. Bowdenweiser | 48.6 % |
| | | | Joseph W. Booth* | 51.4 % |
| State Senator Distric 20 | George H. Bunting, Jr. * | 78.8 % | | |
| | Perry J. Mitchell | 21.2 % | | |
| STATE HOUSE OF REPRESENTATIVES |
| Representative District 2 | Stephanie T. Bolden | 51.2 % | | |
| | Hazel D. Plant* | 48.8 % | | |
| Representative District 3 | Robert Bovell | 44.5 % | | |
| | Helene M. Keeley* | 55.5 % | | |
| State Representative District 8 | S. Quinton Johnson* | 68.7 % | | |
| | Valerie V. Jones-Rabb | 31.3 % | | |
| State Representative District 9 | Richard H. Griffiths | 21.0 % | John Marino | 75.5 % |
| | Rebecca Walker | 79.0 % | Anthony Mirto | 24.5 % |
| State Representative District 10 | Kenneth Dargis | 27.8 % | | |
| | Dennis E. Williams* | 72.2 % | | |
| State Representative District 24 | Kay Wilde Gallogly | 29.1 % | | |
| | Edward S. Osienski | 70.9 % | | |
| State Representative District 27 | Earl G. Jaques, Jr.* | 64.3 % | | |
| | James Maravelias | 35.7 % | | |
| NEW CASTLE COUNTY OFFICES |
| County Council District 3 | | | Janet Kilpatrick | 51.7 % |
| | | | Michael D. Protack | 48.3 % |
| Sheriff | Trinidad Navarro | 63.3 % | William Hart | 56.4 % |
| | Michael P. Walsh* | 36.7 % | Joseph O'Leary | 43.6 % |
| SUSSEX COUNTY OFFICES |
| Recorder of Deeds | John F. Brady | 56.0 % | | |
| | Alma C. Roach | 44.0 % | | |
