99chambers

Connecticut State Senate seat · lines in effect since 2022

Connecticut Senate District 15

A district of about 92,000 people, 39% Hispanic and 22% Black, 18% of adults with a bachelor's degree. It votes D+9.6 relative to the nation for president.

Joan Hartley (D) · since Nov 7, 2000Next election Nov 7, 2028The 2026 race →

Where it sits among all 36 seats

Every Connecticut 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.

D+9.624th most
Democratic
Most DemocraticMost Republican19th seat · the majority lineDistrict 15

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.

2026
Connecticut State SenateD+34.9

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

Source: 99chambers results archive: precinct results allocated to current lines; 2026: Connecticut Secretary of the StateUpdated Nov 7, 2026, 3:01 PM ET

Who lives here, compared

Grey bars show the spread of all 36 seats. Small marks are other seats in Connecticut. The black marker is District 15.

Adults with a bachelor's degree18% 3rd pct · 35th of 36 in CT

Lower than 97% of seats.

White adults without a degree26% 29th pct · 26th of 36 in CT

Lower than 71% of seats.

Hispanic residents39% 94th pct · 3rd of 36 in CT

Higher than 94% of seats.

Black residents22% 91st pct · 4th of 36 in CT

Higher than 91% of seats.

Asian residents3% 9th pct · 33rd of 36 in CT

Lower than 91% of seats.

People per square mile2,850 89th pct · 5th of 36 in CT

Denser than 89% 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 6
33% Hispanic · 27% college gradsD+14.5Held DDistrict 24
28% Hispanic · 39% college gradsD+12.4Held DDistrict 13
27% Hispanic · 34% college gradsD+17.3Held DDistrict 17
38% college gradsD+14.5Held 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. Joan V. Hartley (D)
    2023– · Won 2022 unopposed, 2024 unopposed, 2026 by 34.9

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