99chambers

U.S. House seat · lines in effect since 2026

Tennessee's 1st District

A district of about 785,000 people, 23% of adults with a bachelor's degree. It votes R+57.6 relative to the nation for president.

Diana Harshbarger (R) · since Jan 3, 2021Next election Nov 7, 2028The 2026 race →
TN-1

Source: 2026 results: civicAPI; boundaries: Census Bureau TIGER/LineUpdated Nov 7, 2026, 3:01 PM ET

Where it sits among all 435 seats

Every U.S. House 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+57.6433rd most
Democratic
Most DemocraticMost Republican218th seat · the majority line89574623TN-1

Labels below the bar mark 8 other seats in Tennessee.

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.

20242026
U.S. SenateR+62.0No race
U.S. HouseNo raceR+30.8

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

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

Who lives here, compared

Grey bars show the spread of all 435 seats. Small marks are other seats in Tennessee. The black marker is TN-1.

Adults with a bachelor's degree23% 9th pct · 9th of 9 in TN

Lower than 91% of seats.

White adults without a degree70% 99th pct · 1st of 9 in TN

Higher than 99% of seats.

Hispanic residents5% 16th pct · 9th of 9 in TN

Lower than 84% of seats.

Black residents2% 14th pct · 9th of 9 in TN

Lower than 86% of seats.

Asian residents1% 5th pct · 9th of 9 in TN

Lower than 95% of seats.

People per square mile176 38th pct · 5th of 9 in TN

Less dense than 62% 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.

AL-4
21% college gradsR+64.6Held RPA-13
22% college gradsR+45.7Held RMO-8
21% college gradsR+54.0Held RKY-1
21% college gradsR+46.9Held R

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 2026.

  1. Diana Harshbarger (R)
    2027– · Won 2026 by 30.8

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