![](\"http://www.usa.com/img/s10.gif\")
, rank #1| Population | 12,905 (2010-2014), rank #62 |
| Population Growth | 0.16% since 2000, rank #359 |
| Population Density: | 82.13/sq mi, rank #195 |
| Median Household Income: | $47,077 at 2010-2014—32.87% increase since 2000, see rank |
| Median House Price: | $112,800 at 2010-2014—39.43% increase since 2000, see rank |
| Time Zone: | Central GMT -6:00 with Daylight Saving in the Summer |
| Land Area: | 156.26 sq mi, rank #42 |
| Water Area: | 0.86 sq mi (0.55%), rank #105 |
| State: | Iowa |
| Area: | Spencer, IA |
| County: | Clay County |
| School District: | , rank #1 |