99chambers

Delaware State Senate seat · lines in effect since 2022

Delaware Senate District 19

A district of about 49,000 people, 31% of adults with a bachelor's degree. It votes R+12.2 relative to the nation for president.

Brian Pettyjohn (R) · since Nov 6, 2012Next election Nov 5, 2030The 2026 race →

Where it sits among all 21 seats

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

R+12.217th most
Democratic
Most DemocraticMost Republican11th seat · the majority lineDistrict 19

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.

2024
U.S. SenateR+9.2
GovernorR+11.2

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 21 seats. Small marks are other seats in Delaware. The black marker is District 19.

Adults with a bachelor's degree31% 45th pct · 12th of 21 in DE

Lower than 55% of seats.

White adults without a degree54% 90th pct · 3rd of 21 in DE

Higher than 90% of seats.

Hispanic residents10% 60th pct · 9th of 21 in DE

Higher than 60% of seats.

Black residents7% 15th pct · 18th of 21 in DE

Lower than 85% of seats.

Asian residents1% 10th pct · 19th of 21 in DE

Lower than 90% of seats.

People per square mile293 35th pct · 14th of 21 in DE

Less dense than 65% 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.

District 20
41% college gradsR+15.8Held RDistrict 15
24% college gradsR+27.9Held RDistrict 16
24% Black · 33% college gradsR+0.4Not up in 2026District 21
DelawareR+35.1Not up in 2026

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. Brian G. Pettyjohn (R)
    2023– · Won 2022 unopposed, 2026 unopposed

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