Median age is the age at which half the population is younger and half is older. A lower median age indicates a relatively younger population, while a higher median age indicates a relatively older population.
The median age in Thurston County . . .
- was NA in 1900, compared to NA in 2000, NA in 1990 and NA in 1980;
- was NA in 1900 compared to NA in Washington;
- ranked {Median age, most recent, RankHigh} - from highest to lowest - out of Washington's 0 counties in 1900.