Idaho State House District 9

State Legislative District Profile (Lower Chamber)

Overview

District ID
id-hd-009
State
Idaho
Chamber
Lower chamber
District Code
009
Land Area
2,052.8 sq mi
Water Area
27.1 sq mi

Boundary

Boundary of Idaho State House District 9

Boundary as GeoJSON

Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.

Counties

CountyOverlapShare of district landShare of county land
Washington County1452.85 sq mi70.8%100.0%
Payette County406.89 sq mi19.8%100.0%
Canyon County193.10 sq mi9.4%32.9%

Showing all 3 counties

Places

PlaceOverlapShare of district landShare of place land
Payette city3.98 sq mi0.2%97.4%
Weiser city2.98 sq mi0.1%100.0%
Midvale city2.57 sq mi0.1%100.0%
Fruitland city2.29 sq mi0.1%84.5%
Parma city1.08 sq mi0.1%100.0%
Greenleaf city0.77 sq mi<0.1%100.0%
Wilder city0.71 sq mi<0.1%94.7%
Caldwell city0.69 sq mi<0.1%2.8%
New Plymouth city0.69 sq mi<0.1%99.9%
Cambridge city0.48 sq mi<0.1%100.0%
Notus city0.37 sq mi<0.1%97.9%

Showing all 11 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
ID District 152,960100.0%5.8%100.0%

Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).

Voters

Registered Voters
28,978
Active Voters
28,978 (100.0%)

Party Registration

PartyVotersShare
Democratic1,8876.5%
Republican21,13372.9%
Unaffiliated5,58619.3%
Other parties3721.3%
No party recorded00.0%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–20266,355 (21.9%)0 (0.0%)0 (0.0%)
2023–202425,675 (88.6%)0 (0.0%)0 (0.0%)
2021–202217,954 (62.0%)0 (0.0%)0 (0.0%)
2019–202021,184 (73.1%)1,002 (3.5%)8,187 (28.3%)
2017–201814,434 (49.8%)405 (1.4%)6,069 (20.9%)
2015–201615,311 (52.8%)197 (0.7%)7,364 (25.4%)
2013–20149,718 (33.5%)167 (0.6%)4,866 (16.8%)
2011–201212,005 (41.4%)0 (0.0%)0 (0.0%)

Turnout counts today's registered voters with a counted ballot in the cycle's elections (the odd and even year), as a share of today's registered voters. Voters who have since left the rolls are not counted.

Browse the voter list for this district (premium access; sign-in required)

Source: Civitech voter file snapshot as of 01/12/2026. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".

Demographics

Total Population
55,838 (± 1,196)
Median Age
40.2
Median Household Income
$65,532 (± $2,656)
High School Graduate or Higher (age 25+)
87.2%
Bachelor's Degree or Higher (age 25+)
18.7%

Population by Age

GroupPeopleShare
Under 1814,30625.6%
18 to 6430,13454.0%
65 and over11,39820.4%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)11,27320.2%
White, not Hispanic40,75873.0%
Black, not Hispanic860.2%
Asian, not Hispanic5561.0%
American Indian / Alaska Native, not Hispanic1210.2%
Native Hawaiian / Pacific Islander, not Hispanic240.0%
Some other race, not Hispanic5901.1%
Two or more races, not Hispanic2,4304.4%

Source: U.S. Census Bureau, American Community Survey 2020-2024 ACS 5-year estimates (tables B01001, B01002, B01003, B03002, B15003, B19013) for this state legislative district. Estimates are survey-based; ± figures are 90% margins of error.

Citizen Voting Age Population

Total Citizen Population
53,814
Citizen Voting Age Population (CVAP)
39,510

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic44,34882.4%
Hispanic9,46517.6%
White41,70877.5%
Black860.2%
Asian4770.9%
American Indian / Alaska Native1220.2%
Native Hawaiian / Pacific Islander240.0%
Two or More Races2480.5%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic34,25986.7%
Hispanic5,24613.3%
White32,50382.3%
Black1400.4%
Asian6631.7%
American Indian / Alaska Native8632.2%
Native Hawaiian / Pacific Islander250.1%
Two or More Races690.2%

Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).