In 2017, Spencer, IA had a population of 16.4k people with a median age of 42.2 and a median household income of $48,978. Between 2016 and 2017 the population of Spencer, IA declined from 16,478 to 16,387, a -0.552% decrease and its median household income grew from $48,888 to $48,978, a 0.184% increase.
The population of Spencer, IA is 94% White Alone, 3.31% Hispanic or Latino, and 1.95% Two or More Races. 3.36% of the people in Spencer, IA speak a non-English language, and 99.1% are U.S. citizens.
The median property value in Spencer, IA is $115,700, and the homeownership rate is 69.2%. Most people in Spencer, IA commute by Drove Alone, and the average commute time is 15.2 minutes. The average car ownership in Spencer, IA is 2 cars per household.