Population Forecast
5 year Forecast - -1%
The current population of the Sioux City, IA-NE Market is 427,620 as of the January 2026 PopStats estimate. PopStat’s Trend models indicate a 5 year population change of -1%, resulting in a Population of 423,470 by January 2031. This percentage change in Population ranks 153rd across STI Markets. The Sioux City, IA-NE Market currently ranks 152nd in overall population, and will rank 155th by January 2031.
High and Low Range - -2.5% to 5.1%
While the summation of mid range 5 year forecasts foresee a change in Population of -1% for Sioux City, IA-NE Market. The forecast high ranges of these forecasts leaves open the possibility for a Population change as high as 5.1% at 449,606. Similarly a population change as low as -2.5% at 416,954 is not without possibility.
Figure 73: Population Trend and Forecast
10 year Projections - -1.4%
By January 2036 we project the Population of the Sioux City, IA-NE Market to be 421,422 resulting in a change of -1.4% compared to the current Population. This projected percentage change in Population ranks 151st across STI Markets. The Sioux City, IA-NE Market currently ranks 152nd in overall population, and will rank 155th by January 2036.
