Registered Voters by County

as of 2010-09

Participation among current voters (voter file)

Source: State Board of Elections report for 2010-09 (PDF), downloaded 2026-06-24, read from the PDF's own text and checked: each county's parties add up to its total and the 24 counties add up to the statewide row. Download this month as CSV or see its provenance record.
Democratic minus Republican share of active voters, as of September 2010
Allegany: Republicans +7 points Anne Arundel: Democrats +8 points Baltimore City: Democrats +71 points Baltimore County: Democrats +33 points Calvert: Democrats +1 points Caroline: even Carroll: Republicans +20 points Cecil: Democrats +3 points Charles: Democrats +29 points Dorchester: Democrats +17 points Frederick: Republicans +4 points Garrett: Republicans +34 points Harford: Republicans +1 points Howard: Democrats +17 points Kent: Democrats +14 points Montgomery: Democrats +35 points Prince George's: Democrats +69 points Queen Anne's: Republicans +10 points Somerset: Democrats +22 points St. Mary's: Democrats +2 points Talbot: Republicans +3 points Washington: Republicans +7 points Wicomico: Democrats +10 points Worcester: Democrats +5 points
  • Republican by 40+ points
  • Republican by 10 to 40
  • within 10 points
  • Democratic by 10 to 40
  • Democratic by 40+ points
Unaffiliated share of active voters, as of September 2010
Allegany: 12.5% Anne Arundel: 18.7% Baltimore City: 10.9% Baltimore County: 13.1% Calvert: 17.5% Caroline: 16.2% Carroll: 15.5% Cecil: 18.8% Charles: 15.1% Dorchester: 11.0% Frederick: 19.3% Garrett: 9.8% Harford: 14.9% Howard: 19.1% Kent: 13.0% Montgomery: 21.4% Prince George's: 8.2% Queen Anne's: 14.3% Somerset: 11.4% St. Mary's: 17.2% Talbot: 14.3% Washington: 17.3% Wicomico: 15.0% Worcester: 14.8%
  • under 12%
  • 12 to 16%
  • 16 to 20%
  • 20 to 24%
  • 24% or more
County # Reg vs month before vs year before DEM REP UNAF LIB GRN CON OTH
Allegany 42,285 +103 (+0.2%) – 16,609 (39.3%) 19,689 (46.6%) 5,279 (12.5%) 115 (0.3%) 130 (0.3%) 10 (0.0%) 453 (1.1%)
Anne Arundel 328,933 +769 (+0.2%) – 145,089 (44.1%) 120,037 (36.5%) 61,670 (18.7%) 1,094 (0.3%) 840 (0.3%) 72 (0.0%) 131 (0.0%)
Baltimore City 363,005 +295 (+0.1%) – 288,089 (79.4%) 31,734 (8.7%) 39,739 (10.9%) 693 (0.2%) 1,393 (0.4%) 28 (0.0%) 1,329 (0.4%)
Baltimore County 490,577 +1,755 (+0.4%) – 290,071 (59.1%) 127,939 (26.1%) 64,071 (13.1%) 1,475 (0.3%) 1,319 (0.3%) 76 (0.0%) 5,626 (1.1%)
Calvert 55,922 +109 (+0.2%) – 23,068 (41.3%) 22,282 (39.8%) 9,765 (17.5%) 150 (0.3%) 118 (0.2%) 11 (0.0%) 528 (0.9%)
Caroline 18,058 +64 (+0.4%) – 7,442 (41.2%) 7,464 (41.3%) 2,934 (16.2%) 58 (0.3%) 36 (0.2%) 5 (0.0%) 119 (0.7%)
Carroll 104,884 +441 (+0.4%) – 33,150 (31.6%) 54,127 (51.6%) 16,216 (15.5%) 299 (0.3%) 256 (0.2%) 48 (0.0%) 788 (0.8%)
Cecil 59,496 +160 (+0.3%) – 24,413 (41.0%) 22,714 (38.2%) 11,162 (18.8%) 203 (0.3%) 142 (0.2%) 22 (0.0%) 840 (1.4%)
Charles 89,769 +484 (+0.5%) – 50,648 (56.4%) 24,639 (27.4%) 13,555 (15.1%) 197 (0.2%) 131 (0.1%) 19 (0.0%) 580 (0.6%)
Dorchester 19,773 +64 (+0.3%) – 10,406 (52.6%) 6,981 (35.3%) 2,167 (11.0%) 41 (0.2%) 26 (0.1%) 2 (0.0%) 150 (0.8%)
Frederick 136,739 +249 (+0.2%) – 51,938 (38.0%) 57,518 (42.1%) 26,378 (19.3%) 441 (0.3%) 356 (0.3%) 31 (0.0%) 77 (0.1%)
Garrett 18,356 +31 (+0.2%) – 4,999 (27.2%) 11,292 (61.5%) 1,794 (9.8%) 44 (0.2%) 38 (0.2%) 3 (0.0%) 186 (1.0%)
Harford 148,344 +606 (+0.4%) – 61,902 (41.7%) 62,809 (42.3%) 22,119 (14.9%) 507 (0.3%) 275 (0.2%) 36 (0.0%) 696 (0.5%)
Howard 177,053 +454 (+0.3%) – 85,564 (48.3%) 54,805 (31.0%) 33,836 (19.1%) 557 (0.3%) 441 (0.2%) 39 (0.0%) 1,811 (1.0%)
Kent 12,436 +51 (+0.4%) – 6,150 (49.5%) 4,458 (35.8%) 1,613 (13.0%) 35 (0.3%) 42 (0.3%) 3 (0.0%) 135 (1.1%)
Montgomery 569,813 +592 (+0.1%) – 322,169 (56.5%) 122,565 (21.5%) 121,744 (21.4%) 1,339 (0.2%) 1,425 (0.3%) 57 (0.0%) 514 (0.1%)
Prince George's 514,059 −118 (0.0%) – 401,125 (78.0%) 46,296 (9.0%) 42,120 (8.2%) 710 (0.1%) 697 (0.1%) 48 (0.0%) 23,063 (4.5%)
Queen Anne's 29,608 +181 (+0.6%) – 11,058 (37.3%) 13,932 (47.1%) 4,243 (14.3%) 94 (0.3%) 65 (0.2%) 6 (0.0%) 210 (0.7%)
Somerset 13,252 +74 (+0.6%) – 7,217 (54.5%) 4,364 (32.9%) 1,506 (11.4%) 25 (0.2%) 21 (0.2%) 3 (0.0%) 116 (0.9%)
St. Mary's 58,861 +195 (+0.3%) – 24,581 (41.8%) 23,257 (39.5%) 10,151 (17.2%) 183 (0.3%) 148 (0.3%) 11 (0.0%) 530 (0.9%)
Talbot 25,134 +12 (0.0%) – 10,116 (40.2%) 10,984 (43.7%) 3,585 (14.3%) 77 (0.3%) 51 (0.2%) 7 (0.0%) 314 (1.2%)
Washington 82,913 +184 (+0.2%) – 31,277 (37.7%) 36,763 (44.3%) 14,309 (17.3%) 234 (0.3%) 221 (0.3%) 20 (0.0%) 89 (0.1%)
Wicomico 53,999 +336 (+0.6%) – 25,249 (46.8%) 19,714 (36.5%) 8,106 (15.0%) 150 (0.3%) 110 (0.2%) 9 (0.0%) 661 (1.2%)
Worcester 35,338 +151 (+0.4%) – 15,678 (44.4%) 13,818 (39.1%) 5,223 (14.8%) 107 (0.3%) 68 (0.2%) 5 (0.0%) 439 (1.2%)
Total 3,448,607 +7,242 (+0.2%) – 1,948,008 (56.5%) 920,181 (26.7%) 523,285 (15.2%) 8,828 (0.3%) 8,349 (0.2%) 571 (0.0%) 39,385 (1.1%)
Change from month before +3,401 (+0.2%) +4,659 (+0.5%) −458 (−0.1%) +74 (+0.8%) −12 (−0.1%) +15 (+2.7%) −437 (−1.1%)