New Mexico House of Representatives seat · lines in effect since 2022
New Mexico House District 66
A district of about 42,000 people, 50% Hispanic, 19% of adults with a bachelor's degree. It votes R+55.2 relative to the nation for president.
Where it sits among all 70 seats
Every New Mexico 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.
Democratic
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.
| 2018 | 2020 | 2024 | |
|---|---|---|---|
| U.S. Senate | R+28.8 | R+53.0 | R+65.2 |
| Governor | R+44.5 | No race | No race |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: New Mexico Secretary of StateUpdated Nov 7, 2026, 3:01 PM ET
Who lives here, compared
Grey bars show the spread of all 70 seats. Small marks are other seats in New Mexico. The black marker is District 66.
Lower than 78% of seats.
Higher than 90% of seats.
Higher than 51% of seats.
Lower than 83% of seats.
Lower than 99% of seats.
Less dense than 78% 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 5552% HispanicR+55.9Held RDistrict 3
29% HispanicR+53.6Held RDistrict 62
55% Hispanic · 21% college gradsR+66.0Held RDistrict 54
49% Hispanic · 21% college gradsR+55.6Held 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 2022.
- Leanne Gandy (R)
2027– · Won 2026 unopposed - Jimmy G. Mason (R)
2023–2027 · Won 2022 by 61.7, 2024 unopposed
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)