Population Forecast
5 year Forecast - 0.4%
The current population of the St. Louis, MO-IL Market is 3,225,738 as of the January 2026 PopStats estimate. PopStat’s Trend models indicate a 5 year population change of 0.4%, resulting in a Population of 3,238,983 by January 2031. This percentage change in Population ranks 135th across STI Markets. The St. Louis, MO-IL Market currently ranks 28th in overall population, and will rank 31st by January 2031.
High and Low Range - -1.9% to 6.2%
While the summation of mid range 5 year forecasts foresee a change in Population of 0.4% for St. Louis, MO-IL Market. The forecast high ranges of these forecasts leaves open the possibility for a Population change as high as 6.2% at 3,424,265. Similarly a population change as low as -1.9% at 3,163,360 is not without possibility.
Figure 73: Population Trend and Forecast
10 year Projections - 1%
By January 2036 we project the Population of the St. Louis, MO-IL Market to be 3,259,186 resulting in a change of 1% compared to the current Population. This projected percentage change in Population ranks 134th across STI Markets. The St. Louis, MO-IL Market currently ranks 28th in overall population, and will rank 31st by January 2036.
