Registered Voters by County

as of 2021-05

Participation among current voters (voter file)

Source: State Board of Elections report for 2021-05 (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. The State Board's own report does not add up this month (1 mismatch). See the errata.
Democratic minus Republican share of active voters, as of May 2021
Allegany: Republicans +23 points Anne Arundel: Democrats +10 points Baltimore City: Democrats +70 points Baltimore County: Democrats +31 points Calvert: Republicans +5 points Caroline: Republicans +17 points Carroll: Republicans +24 points Cecil: Republicans +14 points Charles: Democrats +41 points Dorchester: Democrats +5 points Frederick: Democrats +3 points Garrett: Republicans +47 points Harford: Republicans +7 points Howard: Democrats +30 points Kent: Democrats +7 points Montgomery: Democrats +46 points Prince George's: Democrats +72 points Queen Anne's: Republicans +21 points Somerset: Republicans +1 points St. Mary's: Republicans +6 points Talbot: Republicans +3 points Washington: Republicans +12 points Wicomico: Democrats +6 points Worcester: Republicans +10 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 May 2021
Allegany: 18.2% Anne Arundel: 22.9% Baltimore City: 13.5% Baltimore County: 18.2% Calvert: 21.7% Caroline: 20.4% Carroll: 21.4% Cecil: 22.6% Charles: 17.2% Dorchester: 15.6% Frederick: 23.9% Garrett: 13.1% Harford: 20.9% Howard: 23.6% Kent: 17.8% Montgomery: 22.5% Prince George's: 13.3% Queen Anne's: 19.8% Somerset: 15.7% St. Mary's: 21.7% Talbot: 19.0% Washington: 21.2% Wicomico: 19.7% Worcester: 19.2%
  • under 15%
  • 15 to 17.5%
  • 17.5 to 20%
  • 20 to 22.5%
  • 22.5% or more
Change over a year in active voters, May 2020 to May 2021
Allegany: +0.5% Anne Arundel: +1.3% Baltimore City: +0.8% Baltimore County: +0.3% Calvert: +0.1% Caroline: +2.4% Carroll: +1.7% Cecil: +2.6% Charles: +2.0% Dorchester: +2.3% Frederick: +3.9% Garrett: +1.4% Harford: +1.3% Howard: +1.9% Kent: +2.3% Montgomery: -0.1% Prince George's: +1.0% Queen Anne's: +3.5% Somerset: +3.3% St. Mary's: +2.4% Talbot: +3.1% Washington: +0.1% Wicomico: +2.2% Worcester: +3.0%
  • fewer: under -3%
  • -3 to -1%
  • -1 to 1%
  • 1 to 3%
  • more: 3% or more
County # Reg vs month before vs year before DEM REP UNAF LIB GRN BAR WCP OTH
Allegany 43,780 −48 (−0.1%) +231 (+0.5%) 12,495 (28.5%) 22,581 (51.6%) 7,948 (18.2%) 218 (0.5%) 77 (0.2%) 21 (0.0%) 33 (0.1%) 407 (0.9%)
Anne Arundel 406,090 −1,528 (−0.4%) +5,153 (+1.3%) 174,880 (43.1%) 132,304 (32.6%) 93,082 (22.9%) 2,053 (0.5%) 586 (0.1%) 118 (0.0%) 237 (0.1%) 2,830 (0.7%)
Baltimore City 397,493 −788 (−0.2%) +3,144 (+0.8%) 308,674 (77.7%) 29,375 (7.4%) 53,519 (13.5%) 989 (0.2%) 815 (0.2%) 149 (0.0%) 371 (0.1%) 3,601 (0.9%)
Baltimore County 569,866 −1,122 (−0.2%) +1,641 (+0.3%) 315,287 (55.3%) 140,977 (24.7%) 103,716 (18.2%) 2,355 (0.4%) 906 (0.2%) 140 (0.0%) 383 (0.1%) 6,102 (1.1%)
Calvert 67,546 0 (0.0%) +37 (+0.1%) 24,237 (35.9%) 27,589 (40.8%) 14,643 (21.7%) 364 (0.5%) 86 (0.1%) 21 (0.0%) 33 (0.0%) 573 (0.8%)
Caroline 21,402 −11 (−0.1%) +509 (+2.4%) 6,515 (30.4%) 10,199 (47.7%) 4,370 (20.4%) 91 (0.4%) 32 (0.1%) 2 (0.0%) 21 (0.1%) 172 (0.8%)
Carroll 126,877 −72 (−0.1%) +2,181 (+1.7%) 33,810 (26.6%) 63,868 (50.3%) 27,132 (21.4%) 717 (0.6%) 169 (0.1%) 35 (0.0%) 51 (0.0%) 1,095 (0.9%)
Cecil 69,606 −47 (−0.1%) +1,785 (+2.6%) 21,320 (30.6%) 31,240 (44.9%) 15,755 (22.6%) 385 (0.6%) 104 (0.1%) 11 (0.0%) 55 (0.1%) 736 (1.1%)
Charles 119,473 −151 (−0.1%) +2,370 (+2.0%) 73,289 (61.3%) 24,196 (20.3%) 20,588 (17.2%) 367 (0.3%) 113 (0.1%) 21 (0.0%) 91 (0.1%) 808 (0.7%)
Dorchester 22,361 −18 (−0.1%) +498 (+2.3%) 9,792 (43.8%) 8,782 (39.3%) 3,482 (15.6%) 93 (0.4%) 20 (0.1%) 5 (0.0%) 16 (0.1%) 171 (0.8%)
Frederick 189,748 +51 (0.0%) +7,093 (+3.9%) 73,929 (39.0%) 68,076 (35.9%) 45,372 (23.9%) 1,017 (0.5%) 289 (0.2%) 56 (0.0%) 103 (0.1%) 906 (0.5%)
Garrett 20,339 −29 (−0.1%) +284 (+1.4%) 3,919 (19.3%) 13,454 (66.1%) 2,671 (13.1%) 89 (0.4%) 25 (0.1%) 5 (0.0%) 16 (0.1%) 160 (0.8%)
Harford 188,088 −164 (−0.1%) +2,413 (+1.3%) 66,211 (35.2%) 79,498 (42.3%) 39,379 (20.9%) 1,044 (0.6%) 232 (0.1%) 56 (0.0%) 87 (0.0%) 1,581 (0.8%)
Howard 228,972 −34 (0.0%) +4,353 (+1.9%) 120,298 (52.5%) 51,196 (22.4%) 54,143 (23.6%) 839 (0.4%) 315 (0.1%) 50 (0.0%) 75 (0.0%) 2,056 (0.9%)
Kent 13,604 −2 (0.0%) +307 (+2.3%) 5,946 (43.7%) 5,028 (37.0%) 2,427 (17.8%) 50 (0.4%) 19 (0.1%) 3 (0.0%) 11 (0.1%) 120 (0.9%)
Montgomery 675,121 −1,292 (−0.2%) −706 (−0.1%) 411,661 (61.0%) 101,996 (15.1%) 152,056 (22.5%) 2,111 (0.3%) 1,023 (0.2%) 186 (0.0%) 269 (0.0%) 5,819 (0.9%)
Prince George's 603,900 −932 (−0.2%) +6,025 (+1.0%) 471,620 (78.1%) 38,626 (6.4%) 80,189 (13.3%) 1,218 (0.2%) 715 (0.1%) 149 (0.0%) 325 (0.1%) 11,058 (1.8%)
Queen Anne's 38,393 +16 (0.0%) +1,291 (+3.5%) 11,119 (29.0%) 19,107 (49.8%) 7,591 (19.8%) 208 (0.5%) 45 (0.1%) 6 (0.0%) 14 (0.0%) 303 (0.8%)
Somerset 13,845 +16 (+0.1%) +441 (+3.3%) 5,673 (41.0%) 5,802 (41.9%) 2,172 (15.7%) 58 (0.4%) 24 (0.2%) 5 (0.0%) 9 (0.1%) 102 (0.7%)
St. Mary's 74,602 −221 (−0.3%) +1,741 (+2.4%) 26,465 (35.5%) 30,758 (41.2%) 16,175 (21.7%) 419 (0.6%) 101 (0.1%) 19 (0.0%) 46 (0.1%) 619 (0.8%)
Talbot 28,388 +25 (+0.1%) +851 (+3.1%) 10,848 (38.2%) 11,706 (41.2%) 5,397 (19.0%) 125 (0.4%) 32 (0.1%) 3 (0.0%) 13 (0.0%) 264 (0.9%)
Washington 98,562 −105 (−0.1%) +116 (+0.1%) 32,052 (32.5%) 43,919 (44.6%) 20,927 (21.2%) 574 (0.6%) 139 (0.1%) 26 (0.0%) 67 (0.1%) 858 (0.9%)
Wicomico 64,889 −22 (0.0%) +1,426 (+2.2%) 27,259 (42.0%) 23,684 (36.5%) 12,796 (19.7%) 313 (0.5%) 94 (0.1%) 16 (0.0%) 61 (0.1%) 666 (1.0%)
Worcester 41,093 +29 (+0.1%) +1,184 (+3.0%) 14,076 (34.3%) 18,364 (44.7%) 7,899 (19.2%) 188 (0.5%) 52 (0.1%) 6 (0.0%) 14 (0.0%) 494 (1.2%)
Total 4,124,038 −6,449 (−0.2%) +44,368 (+1.1%) 2,261,375 (54.8%) 1,002,325 (24.3%) 793,429 (19.2%) 15,885 (0.4%) 6,013 (0.1%) 1,109 (0.0%) 2,401 (0.1%) 41,501 (1.0%)
Change from month before −4,515 (−0.2%) −3,826 (−0.4%) +1,652 (+0.2%) +47 (+0.3%) +14 (+0.2%) −5 (−0.4%) +35 (+1.5%) +149 (+0.4%)
Change from year before +20,077 (+0.9%) −12,187 (−1.2%) +30,708 (+4.0%) – – +446 (+67.3%) +2,340 (+3,836.1%) −18,914 (−31.3%)