St. Mary's County, MD
MD · Presidential Elections 1892–2024
St. Mary's County, MD (Maryland) voted R+17.0 for Donald Trump (Republican) in the 2024 presidential election, with Trump receiving 33,582 votes (56.96%) to 23,531 (39.91%) for Harris.
This represents a R+3.2% swing toward Republicans compared to 2020. St. Mary's County is classified as a solid Republican county. St. Mary's County has voted Republican in every presidential election since 1980. The county has a population of approximately 115,126.
Open in Cartographer
Interactive map with county profile in split-screen view
Quick Stats
Demographics
Community Profile
Religious Composition
Source: Religion Census 2020Ancestry Groups
Source: Census ACSTop reported ancestry groups (compared to national average).
Age Distribution
Employment by Industry
Census ACSPresidential Elections
Presidential Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2024 | 39.9%(23,531) | 57.0%(33,582) | R+17.0 | R+3.2 |
| 2020 | 41.6%(23,138) | 55.4%(30,826) | R+13.8 | D+8.9 |
| 2016 | 35.8%(17,534) | 58.5%(28,663) | R+22.7 | R+7.9 |
| 2012 | 41.2%(19,711) | 56.0%(26,797) | R+14.8 | R+2.0 |
| 2008 | 42.8%(19,023) | 55.6%(24,705) | R+12.8 | D+13.4 |
| 2004 | 36.3%(13,776) | 62.6%(23,725) | R+26.2 | R+9.5 |
| 2000 | 40.4%(11,912) | 57.1%(16,856) | R+16.8 | R+9.0 |
| 1996 | 42.0%(9,988) | 49.7%(11,835) | R+7.8 | D+2.4 |
| 1992 | 35.6%(8,931) | 45.8%(11,485) | R+10.2 | D+16.1 |
| 1988 | 36.6%(7,434) | 62.9%(12,767) | R+26.3 | D+0.8 |
Source: Official state election returns via MIT Election Data + Science Lab
Presidential Margin Trend
St. Mary's County, MD • 1892–2024
Senate Elections
Senate Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2024 | 31.5%(18,426) | 68.2%(39,877) | R+36.7 | R+20.2 |
| 2022 | 41.7%(15,662) | 58.3%(21,869) | R+16.5 | R+5.2 |
| 2018 | 41.9%(16,849) | 53.3%(21,393) | R+11.3 | D+10.7 |
| 2016 | 38.8%(17,980) | 60.8%(28,207) | R+22.0 | R+17.9 |
| 2012 | 38.3%(17,566) | 42.5%(19,480) | R+4.2 | R+0.2 |
| 2010 | 46.9%(14,669) | 50.8%(15,911) | R+4.0 | D+12.8 |
| 2006 | 40.8%(11,614) | 57.5%(16,381) | R+16.7 | R+18.5 |
| 2004 | 50.0%(18,440) | 48.3%(17,802) | D+1.7 | R+5.0 |
| 2000 | 53.3%(15,273) | 46.6%(13,357) | D+6.7 | R+27.6 |
| 1998 | 67.1%(14,440) | 32.9%(7,067) | D+34.3 | D+22.4 |
Source: Official state election returns via MIT Election Data + Science Lab
Governor Elections
Governor Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2022 | 39.9%(15,057) | 56.1%(21,150) | R+16.2 | D+37.4 |
| 2018 | 22.5%(9,084) | 76.0%(30,703) | R+53.5 | R+6.0 |
| 2014 | 25.2%(8,203) | 72.7%(23,675) | R+47.5 | R+32.3 |
| 2010 | 41.0%(12,990) | 56.2%(17,804) | R+15.2 | D+2.8 |
| 2006 | 40.2%(11,516) | 58.3%(16,683) | R+18.0 | D+9.4 |
| 2002 | 35.8%(9,048) | 63.2%(15,986) | R+27.4 | R+18.5 |
| 1998 | 45.5%(9,929) | 54.5%(11,880) | R+8.9 | D+8.1 |
| 1994 | 41.5%(7,902) | 58.5%(11,138) | R+17.0 | R+43.3 |
| 1990 | 63.1%(8,838) | 36.9%(5,159) | D+26.3 | R+36.5 |
| 1986 | 81.4%(9,600) | 18.6%(2,192) | D+62.8 | D+25.1 |
Source: Official state election returns via MIT Election Data + Science Lab