What are the fastest-growing counties in North Dakota?
Cass County is the fastest-growing county in North Dakota: its population grew 1.76% a year from 2020 to 2025, to 201,794 residents (Census PEP Vintage 2025). Burleigh County (0.93%) and Morton County (0.75%) follow. North Dakota as a whole grew 0.50% a year to 799,358 residents.
Data as of 2026-09-23. Population, growth and migration: PEP Vintage 2025 · 2020–2025. Income migration: IRS SOI 2022–2023 (2-yr lag).
Top 10 counties in North Dakota by population growth, 2020 to 2025
| Rank | County | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Cass County | 201,794 | 1.76% | +6,297 | +5,322 | -$26.9M |
| 2 | Burleigh County | 103,251 | 0.93% | +1,662 | +1,765 | -$1.5M |
| 3 | Morton County | 34,601 | 0.75% | +628 | +253 | -$6.3M |
| 4 | McKenzie County | 15,192 | 0.55% | -361 | +85 | -$1.1M |
| 5 | Grand Forks County | 74,501 | 0.37% | -2,146 | +2,109 | -$23.2M |
| 6 | Williams County | 41,767 | 0.28% | -2,151 | +650 | +$4.5M |
| 7 | Richland County | 16,731 | 0.23% | +52 | +26 | -$0.6M |
| 8 | Stark County | 34,013 | 0.11% | -1,145 | +297 | -$4.4M |
| 9 | Ramsey County | 11,530 | -0.08% | -125 | +82 | +$0.3M |
| 10 | Stutsman County | 21,414 | -0.12% | -151 | +187 | -$3.0M |
Where are people moving in North Dakota?
Cass County gained the most people from elsewhere in the United States: net domestic migration of +6,297 from 2020 to 2025 (Census PEP Vintage 2025). The table ranks every North Dakota place with 10,000 or more residents by that figure; the IRS column shows net adjusted gross income migration for 2022 to 2023.
| Rank | County | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Cass County | 201,794 | 1.76% | +6,297 | +5,322 | -$26.9M |
| 2 | Burleigh County | 103,251 | 0.93% | +1,662 | +1,765 | -$1.5M |
| 3 | Morton County | 34,601 | 0.75% | +628 | +253 | -$6.3M |
| 4 | Richland County | 16,731 | 0.23% | +52 | +26 | -$0.6M |
| 5 | Barnes County | 10,573 | -0.54% | -101 | +170 | -$0.4M |
| 6 | Ramsey County | 11,530 | -0.08% | -125 | +82 | +$0.3M |
| 7 | Stutsman County | 21,414 | -0.12% | -151 | +187 | -$3.0M |
| 8 | Walsh County | 10,179 | -0.68% | -284 | +71 | -$3.3M |
| 9 | McKenzie County | 15,192 | 0.55% | -361 | +85 | -$1.1M |
| 10 | Rolette County | 11,688 | -0.83% | -483 | +33 | -$0.9M |
Go past the headline numbers
The interactive Demographics map layer and the full report for a single place are part of paid plans.
Get the Demographics Report for Cass CountyFrequently asked questions
- What are the fastest-growing counties in North Dakota?
- By population growth from 2020 to 2025, the fastest are Cass County (1.76% a year), Burleigh County (0.93% a year), Morton County (0.75% a year), McKenzie County (0.55% a year) and Grand Forks County (0.37% a year) (Census PEP Vintage 2025). Only places with 10,000 or more residents are ranked.
- Where are people moving in North Dakota?
- By net domestic migration from 2020 to 2025, the largest gains are Cass County (+6,297), Burleigh County (+1,662) and Morton County (+628) (Census PEP Vintage 2025).
- How fast is North Dakota growing overall?
- North Dakota grew 0.50% a year from 2020 to 2025, to 799,358 residents, with net migration of +7,455 people (Census PEP Vintage 2025).
- Where does this North Dakota data come from, and how current is it?
- Population, growth and migration come from the U.S. Census Bureau Population Estimates Program (PEP Vintage 2025 · 2020–2025). Income migration comes from IRS Statistics of Income (IRS SOI 2022–2023 (2-yr lag)). Counties with fewer than 10,000 residents are not ranked (39 of 53 in North Dakota). Data last loaded 2026-09-23.
Data as of 2026-09-23: sources and periods
- Population, growth and migration
- U.S. Census Bureau, Population Estimates Program: PEP Vintage 2025 · 2020–2025. census.gov/programs-surveys/popest
- Income migration (net AGI)
- Internal Revenue Service, Statistics of Income migration data: IRS SOI 2022–2023 (2-yr lag). irs.gov/statistics/soi-tax-stats-migration-data
How to read the table
- Population is the Census July 1 estimate of the latest vintage.
- Growth is the compound annual rate over 2020 to 2025.
- Net domestic and international migration are cumulative people over 2020 to 2025.
- IRS net AGI migration is adjusted gross income that moved in, less what moved out, for 2022 to 2023. A plus sign means a net inflow.
- Places with fewer than 10,000 residents are left out of the rankings.