MSBE2008 Primary Congressional District 04
| Congressional District 04 Total Turnout | |||||||
| County | Registered | Voter Pool | Voted Polls | Provisional | Absentee | Total Voted | % Voted |
| Montgomery | 143,279 | 143,279 | 56,816 | 3,050 | 2,832 | 62,698 | 43.76% |
| Prince George's | 226,354 | 197,286 | 89,126 | 2,609 | 3,196 | 94,931 | 48.12% |
| Total | 369,633 | 340,565 | 145,942 | 5,659 | 6,028 | 157,629 | 46.28% |
| Congressional District 04 Democratic Turnout | |||||||
| County | Registered | Voter Pool | Voted Polls | Provisional | Absentee | Total Voted | % Voted |
| Montgomery | 76,368 | 76,368 | 41,746 | 1,593 | 2,195 | 45,534 | 59.62% |
| Prince George's | 183,383 | 183,383 | 85,871 | 2,566 | 3,013 | 91,450 | 49.87% |
| Total | 259,751 | 259,751 | 127,617 | 4,159 | 5,208 | 136,984 | 52.74% |
| Congressional District 04 Republican Turnout | |||||||
| County | Registered | Voter Pool | Voted Polls | Provisional | Absentee | Total Voted | % Voted |
| Montgomery | 36,184 | 36,184 | 12,166 | 580 | 570 | 13,316 | 36.80% |
| Prince George's | 13,903 | 13,903 | 3,255 | 43 | 183 | 3,481 | 25.04% |
| Total | 50,087 | 50,087 | 15,421 | 623 | 753 | 16,797 | 33.54% |
| Congressional District 04 Green Turnout | |||||||
| County | Registered | Voter Pool | Voted Polls | Provisional | Absentee | Total Voted | % Voted |
| Montgomery | 367 | 367 | 40 | 11 | 2 | 53 | 14.44% |
| Prince George's | 170 | N/A | 0 | 0 | 0 | 0 | N/A |
| Total | 537 | 367 | 40 | 11 | 2 | 53 | 14.44% |
| Congressional District 04 Libertarian Turnout | |||||||
| County | Registered | Voter Pool | Voted Polls | Provisional | Absentee | Total Voted | % Voted |
| Montgomery | 233 | 233 | 24 | 4 | 1 | 29 | 12.45% |
| Prince George's | 187 | N/A | 0 | 0 | 0 | 0 | N/A |
| Total | 420 | 233 | 24 | 4 | 1 | 29 | 12.45% |
| Congressional District 04 Unaffiliated Turnout | |||||||
| County | Registered | Voter Pool | Voted Polls | Provisional | Absentee | Total Voted | % Voted |
| Montgomery | 30,127 | 30,127 | 2,840 | 862 | 64 | 3,766 | 12.50% |
| Prince George's | 28,711 | N/A | 0 | 0 | 0 | 0 | N/A |
| Total | 58,838 | 30,127 | 2,840 | 862 | 64 | 3,766 | 12.50% |
NOTE: Voter pool means those voters entitled to vote for certain candidates in their respective jurisdictions