99chambers

Delaware House of Representatives seat · lines in effect since 2022

Delaware House District 20

A district of about 21,000 people, 50% of adults with a bachelor's degree. It votes D+8.0 relative to the nation for president.

Alonna Berry (D) · since Aug 5, 2025Next election Nov 7, 2028The 2026 race →

Where it sits among all 41 seats

Every Delaware House of Representatives seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.

D+8.029th most
Democratic
Most DemocraticMost Republican21st seat · the majority lineDistrict 20

Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET

Every race on these lines

Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.

202220242026
U.S. SenateNo raceD+9.0No race
GovernorNo raceD+6.5No race
Delaware House of RepresentativesD+2.9D+1.4D+12.1

Outlined: the race for this seat itselfBlank: no race that year

Source: 99chambers results archive: precinct results allocated to current lines; 2026: Delaware Department of ElectionsUpdated Nov 7, 2026, 3:01 PM ET

Who lives here, compared

Grey bars show the spread of all 41 seats. Small marks are other seats in Delaware. The black marker is District 20.

Adults with a bachelor's degree50% 80th pct · 9th of 41 in DE

Higher than 80% of seats.

White adults without a degree44% 70th pct · 13th of 41 in DE

Higher than 70% of seats.

Hispanic residents5% 15th pct · 35th of 41 in DE

Lower than 85% of seats.

Black residents4% 10th pct · 37th of 41 in DE

Lower than 90% of seats.

Asian residents3% 45th pct · 23rd of 41 in DE

Lower than 55% of seats.

People per square mile254 28th pct · 30th of 41 in DE

Less dense than 72% of seats.

Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET

Seats most like this one

Nearest seats on demographics, density and lean. 1 of the 4 flipped this year.

District 14
56% college gradsD+21.7Held DDistrict 38
51% college gradsR+13.0Held RDistrict 9
23% Black · 41% college gradsD+15.2Flipped DDistrict 8
26% Black · 46% college gradsD+24.7Held D

Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET

Who has held it

These lines took effect in 2022.

  1. Alonna Berry (D)
    2026– · Won 2025 by 1.3, 2026 by 12.1
  2. Stell Parker Selby (D)
    2023–2026 · Won 2022 by 2.9, 2024 by 1.4

Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)