Dallas County Population 2024. Dallas county, missouri's estimated 2024 population is 17,949 with a growth rate of 1.02% in the past year according to the most recent united states census data. Not the first earthquake this week.
Dallas county added about 4,300 people in 2023, only because there were about twice as many births as there were deaths. A 2016 study estimated a 75 percent drop in the number of u.s.