The figures on this page were reported to the State Board of Elections by each of the 24 county Boards of Elections of the State of Maryland. County Boards of Elections communicate their results to the State Board once all of their precinct data has been collected. The State Board of Elections posts those results immediately upon receipt. Last updated at 12:17 PM on Tuesday, April 06, 2004 (US Eastern Time).
| George W. Bush (Won) | |
| Caroline | 1,522 |
| Carol Moseley Braun | Wesley K. Clark | Howard Dean | John Edwards | |
| Caroline | 12 | 17 | 60 | 649 |
| Dick Gephardt | Mildred Glover | John F. Kerry (Won) | Dennis J. Kucinich | |
| Caroline | 12 | 38 | 882 | 14 |
| Lyndon H. LaRouche, Jr. | Joseph Lieberman | Alfred Sharpton, Jr. | Uncommitted To Any Presidential Candidate | |
| Caroline | 8 | 21 | 42 | 60 |
| George W. Bush (Won) | |
| Caroline | 1,522 |
| Carol Moseley Braun | Wesley K. Clark | Howard Dean | John Edwards | |
| Caroline | 12 | 17 | 60 | 649 |
| Dick Gephardt | Mildred Glover | John F. Kerry (Won) | Dennis J. Kucinich | |
| Caroline | 12 | 38 | 882 | 14 |
| Lyndon H. LaRouche, Jr. | Joseph Lieberman | Alfred Sharpton, Jr. | Uncommitted To Any Presidential Candidate | |
| Caroline | 8 | 21 | 42 | 60 |
| Ray Bly | Earl S. Gordon | Dorothy Corry Jennings | James A. Kodak | |
| Caroline | 30 | 36 | 46 | 16 |
| Eileen "Cookie Baker" Martin | E. J. Pipkin (Won) | John Stafford | Corrogan R. Vaughn | |
| Caroline | 72 | 1,173 | 63 | 37 |
| Gene Zarwell | |
| Caroline | 44 |
| Sid Altman | A. Robert Kaufman | Barbara A. Mikulski (Won) | |
| Caroline | 62 | 145 | 1,537 |
| Richard F. Colburn | Wayne T. Gilchrest (Won) | |
| Caroline | 854 | 814 |
| Kostas Alexakis | Steven R. Eastaugh | Harry E. Sampson | Ann D. Tamlyn (Won) | |
| Caroline | 358 | 263 | 328 | 427 |
| Donna F. Cantor John F. Kerry (Won) | Connie DeJuliis Dick Gephardt | Cheryl Ann Everman John Edwards (Won) | Erin M. Fitzsimmons Howard Dean | |
| Caroline | 848 | 143 | 736 | 174 |
| Patricia Ann Foerster Dick Gephardt | Karen E. Greene Wesley K. Clark | Hope R. Harrington Wesley K. Clark | Jacqueline L. Harris Howard Dean | |
| Caroline | 179 | 170 | 262 | 197 |
| Mary Carol "Sam" Miller Dick Gephardt | M. Catherine Poe Howard Dean | Ann Marie Remillard | Treva Ross Lyndon H. LaRouche Jr. | |
| Caroline | 138 | 140 | 326 | 41 |
| Frances M. Ruark Lyndon H. LaRouche Jr. | Edith L. Segree Dick Gephardt | Donna Smith Turner Wesley K. Clark | |
| Caroline | 61 | 59 | 90 |
| Joseph M. Alden John F. Kerry (Won) | Edmund T. Bennett John F. Kerry (Won) | Eric M. Bromwell Wesley K. Clark | Jon S. Cardin Dick Gephardt | |
| Caroline | 721 | 657 | 79 | 125 |
| Charles T. Dean, III John Edwards (Won) | Michael A. Eaves John F. Kerry | Grason Eckel | Ryan Ewing Howard Dean | |
| Caroline | 712 | 526 | 223 | 153 |
| George A. Gorayeb Howard Dean | J. Christopher Llinas John Edwards | Gene M. Ransom, III Wesley K. Clark | Daniel Rozmiarek Howard Dean | |
| Caroline | 72 | 422 | 81 | 67 |
| Jack R. Sturgill, Jr. | Ted Venetoulis Dick Gephardt | George W. Wilson, Jr. Wesley K. Clark | |
| Caroline | 160 | 88 | 106 |
| Richard F. Colburn | Ann Horner Granados George W. Bush (Won) | Nora Keenan | Tony McConkey | |
| Caroline | 1,025 | 634 | 151 | 126 |
| Lee Merrell | J. Lowell Stoltzfus George W. Bush (Won) | Cathleen M. Vitale George W. Bush (Won) | |
| Caroline | 125 | 1,011 | 806 |
| Andy Harris George W. Bush (Won) | Donna D. Judge George W. Bush (Won) | Jean L. Rothert George W. Bush (Won) | |
| Caroline | 1,164 | 1,111 | 1,051 |