
South Dakota Expects 100,000 More Residents By 2040, Ranking 16th Nationally
If you feel like there are more and more people in South Dakota these days you're not imagining hings.
The Mount Rushmore State contuinuies to see a steady increase in population which, according to the Dakota Institute can be attributed to three main factors:
- Domestic Migration
- Urban Expansion
- Higher Birth Rates
That's fueled one of the South Dakota's biggest population influxes over a 25-year period, with the state adding more than 180,000 residents since 2000.
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At that pace, South Dakota is expected to top one million residents sometime in the next five to ten years.
But what about the numbers long term?
The U.S. population is projected to add roughly 21.5 million people between 2025 and 2040, an increase of 6.3%, but South Dakota's share is expected to exceed that in a big way.
According to research from the Weldon Cooper Center for Public Service at the University of Virginia, benchmarked to the 2020 U.S. Census and 2025 population estimates, the starte's population is expected to grow by nearly 11 percent, with an additional 100,460 people calling South Dakota home in the next 14 years. That's projected to be the 16th highest growth rate amomg the 50 states.
That would push the state's population to 1,035,000 by 2040.
South Dakota Population by Decade
- 1890: 348,600
- 1900: 401,570 (+15.2%)
- 1910: 583,888 (+45.4%)
- 1920: 636,547 (+9.0%)
- 1930: 692,849 (+8.8%)
- 1940: 642,961 (-7.2%)
- 1950: 652,740 (+1.5%)
- 1960: 680,514 (+4.3%)
- 1970: 665,507 (−2.2%)
- 1980: 690,768 (+3.8%)
- 1990: 696,004 (+0.8%)
- 2000: 754,844 (+8.5%)
- 2010: 814,180 (+7.9%)
- 2020: 886,667 (+8.9%)
- 2025: 935,094 (+5.5%)
Nationally, Idaho is predicted to have the biggest population growth by 2024, an increase of 24.1 percent.
On the other end of the spectrum, West Virginia is one of 14 states expected to lose residents during that time frame, dropping 8.4 percent of its population.

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