Maryland / MD-01
Maryland District 1
Score
Irregularity score 42 Middle of the packLess compact than 42% of other congressional districts.
249th least compact of 429 nationally, 5th of 8 in Maryland.
A score describes shape, not intent. Coastlines, rivers and the Voting Rights Act can all make a district irregular. How scores work
The three measures
- Polsby-Popper
- 0.05at least as compact as 2% of districts on this measure
Area compared with perimeter. Low for jagged or snaking edges.
- Reock
- 0.57at least as compact as 73% of districts on this measure
Area compared with the smallest circle around the district, counting only land. Low for stretched shapes.
- Convex hull
- 0.95at least as compact as 98% of districts on this measure
Area compared with a rubber band stretched around the district, counting only land. Low for bites and tentacles.
Each measure runs from 0 to 1, where 1 is a perfect circle or a shape with no dents.
The state's edge
94% of this district's border is the state's edge: a coastline, a national border or a state line. Mapmakers don't choose those lines. A ragged one, like a coastline or a river, lowers Polsby-Popper. Reock and convex hull count only the state's own land, so water and neighboring states don't count against them. More on the state's edge
Cities and towns
The largest places with people in this district, from the 2020 Census. A place split between districts shows how many of its residents live in this one.
- Bel Air South communityall 57,648 residents
- Salisbury cityall 33,050 residents
- Bel Air North communityall 31,841 residents
- Edgewood communityall 25,713 residents
- Easton townall 17,101 residents
- Aberdeen cityall 16,254 residents
- Elkton townall 15,807 residents
- Havre de Grace cityall 14,807 residents
- Joppatowne communityall 13,425 residents
- Cambridge cityall 13,096 residents
And 120 smaller places. 42% of this district's people live outside any city, town or named community. How places are counted
ZIP codes
146 ZIP codes have residents in this district. 12 of them are split with other districts. A percentage is the share of that ZIP code's 2020 residents who live here.
Show all 146 ZIP codes
- 19973 (1%)
- 21001
- 21005
- 21009
- 21010
- 21013
- 21014
- 21015
- 21017
- 21028
- 21034
- 21040
- 21047
- 21050
- 21051
- 21053 (9%)
- 21057 (99%)
- 21078
- 21082
- 21084
- 21085
- 21087
- 21105
- 21111 (59%)
- 21120 (41%)
- 21128 (84%)
- 21130
- 21131 (67%)
- 21132
- 21154
- 21156
- 21160
- 21161
- 21162 (88%)
- 21220 (19%)
- 21236 (8%)
- 21601
- 21607
- 21610
- 21612
- 21613
- 21617
- 21619
- 21620
- 21622
- 21623
- 21624
- 21625
- 21626
- 21627
- 21628
- 21629
- 21631
- 21632
- 21634
- 21635
- 21636
- 21638
- 21639
- 21640
- 21641
- 21643
- 21644
- 21645
- 21647
- 21648
- 21649
- 21650
- 21651
- 21652
- 21653
- 21654
- 21655
- 21657
- 21658
- 21659
- 21660
- 21661
- 21662
- 21663
- 21664
- 21665
- 21666
- 21667
- 21668
- 21669
- 21671
- 21672
- 21673
- 21675
- 21676
- 21677
- 21678
- 21679
- 21801
- 21804
- 21810
- 21811
- 21813
- 21814
- 21817
- 21821
- 21822
- 21824
- 21826
- 21829
- 21830
- 21835
- 21837
- 21838
- 21840
- 21841
- 21842
- 21849
- 21850
- 21851
- 21853
- 21856
- 21861
- 21862
- 21863
- 21864
- 21865
- 21866
- 21867
- 21869
- 21871
- 21872
- 21874 (99%)
- 21875
- 21890
- 21901
- 21902
- 21903
- 21904
- 21911
- 21912 (99%)
- 21913
- 21914
- 21915
- 21917
- 21918
- 21919
- 21920
- 21921
- 21930
These are the Census Bureau's ZIP code areas, which match residential ZIP codes closely. ZIP codes used only for PO boxes or a single organization aren't included. How ZIP codes are matched
2024 presidential vote
Shares of the votes for the two of them; other candidates are left out. Maryland used the same lines in 2024, so this is added up from precinct results. A precinct split between districts is divided by its House votes, so the figures are close estimates. Where the votes come from
U.S. House
Andy Harris, Republican
Elected November 3, 2026, takes office January 3, 2027.
Unofficial results from the Maryland State Board of Elections, checked November 6, 2026. A race shows a winner once news decision desks have called it. Results become official when the state certifies them. Where this comes from
Maryland's senators
- Angela D. Alsobrooks, Democrat
- Chris Van Hollen, Democrat
Senators are elected by the whole state, so district lines don't change who they are. Senators serving as of November 6, 2026. Senators elected in November 2026 take office January 3, 2027. Where this comes from
Where it sits in Maryland
- Very compact (0 to 19)
- Compact (20 to 39)
- Middle (40 to 59)
- Irregular (60 to 79)
- Very irregular (80 to 100)
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