From a total population of 3,822, Lewis County has a median age of 48.4. The average age of males, in Lewis County, is 46.6 while the average age of females is 49.7. When you compare this to median age of Idaho, Lewis County is 13.2 years older.
The median income of individuals, in Lewis County, is $21,542 while the average household income is $36,159. When comparing the median income of people living in Lewis County to the rest of Idaho, the average income in Lewis County is $1,545 less.