From a total population of 4,031, Columbia County has a median age of 49.2. The average age of males, in Columbia County, is 47.7 while the average age of females is 51. When you compare this to median age of Washington, Columbia County is 11.8 years older.
The median income of individuals, in Columbia County, is $23,558 while the average household income is $41,071. When comparing the median income of people living in Columbia County to the rest of Washington, the average income in Columbia County is $7,675 less.