North Dakota State House District 31

State Legislative District Profile (Lower Chamber)

Overview

District ID
nd-hd-031
State
North Dakota
Chamber
Lower chamber
District Code
031
Land Area
4,267.7 sq mi
Water Area
55.8 sq mi

Boundary

Boundary of North Dakota State House District 31

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Grant County1659.23 sq mi38.9%100.0%
Sioux County1094.05 sq mi25.6%100.0%
Morton County943.25 sq mi22.1%49.0%
Hettinger County571.84 sq mi13.4%50.5%

Showing all 4 counties

Places

PlaceOverlapShare of district landShare of place land
Cannon Ball CDP88.27 sq mi2.1%100.0%
Mandan city4.28 sq mi0.1%31.6%
Carson city3.99 sq mi0.1%100.0%
Leith city1.24 sq mi<0.1%100.0%
Mott city0.92 sq mi<0.1%100.0%
New Leipzig city0.89 sq mi<0.1%100.0%
Elgin city0.82 sq mi<0.1%99.9%
Flasher city0.64 sq mi<0.1%100.0%
Regent city0.56 sq mi<0.1%100.0%
Solen city0.33 sq mi<0.1%100.0%
Selfridge city0.29 sq mi<0.1%99.9%
Raleigh CDP0.29 sq mi<0.1%100.0%
Porcupine CDP0.20 sq mi<0.1%100.0%
Heil CDP0.20 sq mi<0.1%100.0%
Fort Yates city0.06 sq mi<0.1%100.0%

Showing all 15 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
ND At-Large15,992100.0%2.1%100.0%

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

Voters

Registered Voters
7,884
Active Voters
7,884 (100.0%)

Party Registration

This state's voter file does not record party registration.

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2023–20247,387 (93.7%)0 (0.0%)0 (0.0%)
2021–20225,039 (63.9%)0 (0.0%)0 (0.0%)
2019–20206,167 (78.2%)0 (0.0%)0 (0.0%)
2017–20185,484 (69.6%)0 (0.0%)0 (0.0%)
2015–20165,443 (69.0%)0 (0.0%)0 (0.0%)
2013–20143,873 (49.1%)0 (0.0%)0 (0.0%)
2011–20123,691 (46.8%)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 09/16/2025. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".

Demographics

Total Population
15,065 (± 919)
Median Age
38.9
Median Household Income
$64,167 (± $9,726)
High School Graduate or Higher (age 25+)
91.3%
Bachelor's Degree or Higher (age 25+)
26.4%

Population by Age

GroupPeopleShare
Under 183,69324.5%
18 to 648,28555.0%
65 and over3,08720.5%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)4332.9%
White, not Hispanic9,95866.1%
Black, not Hispanic3662.4%
Asian, not Hispanic690.5%
American Indian / Alaska Native, not Hispanic3,67224.4%
Native Hawaiian / Pacific Islander, not Hispanic00.0%
Some other race, not Hispanic1921.3%
Two or more races, not Hispanic3752.5%

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
15,001
Citizen Voting Age Population (CVAP)
11,310

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic14,56797.1%
Hispanic4342.9%
White10,15467.7%
Black3652.4%
Asian150.1%
American Indian / Alaska Native3,67124.5%
Native Hawaiian / Pacific Islander00.0%
Two or More Races30.0%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic11,00997.3%
Hispanic3012.7%
White8,19372.4%
Black3973.5%
Asian180.2%
American Indian / Alaska Native2,40421.3%
Native Hawaiian / Pacific Islander10.0%
Two or More Races30.0%

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