From a total population of 10,986, Spencer has a median age of 42.4. The average age of males, in Spencer, is 40.5 while the average age of females is 45. When you compare this to median age of Iowa, Spencer is 4.4 years older.
The median income of individuals, in Spencer, is $28,837 while the average household income is $44,467. When comparing the median income of people living in Spencer to the rest of Iowa, the average income in Spencer is $1,216 more.