From a total population of 9,607, Monmouth has a median age of 23.3. The average age of males, in Monmouth, is 24.4 while the average age of females is 22.4. When you compare this to median age of Oregon, Monmouth is 15.6 years younger.
The median income of individuals, in Monmouth, is $17,292 while the average household income is $35,750. When comparing the median income of people living in Monmouth to the rest of Oregon, the average income in Monmouth is $9,881 less.