| United States | Iowa | Plymouth County | ||
|---|---|---|---|---|
| Total owner occupied | 2009 | 75320422 | 886444 | 7825 |
| 2015 | 74712091 | 883808 | 7913 | |
| % change | -0.8 | -0.3 | 1.1 | |
| Below 35 years age group | 2009 | 9171992 | 129900 | 930 |
| 2015 | 7433016 | 118884 | 822 | |
| % change | -19.0 | -8.5 | -11.6 | |
| 35 to 44 years age group | 2009 | 14800672 | 162088 | 1460 |
| 2015 | 12174546 | 141039 | 1260 | |
| % change | -17.7 | -13.0 | -13.7 | |
| 45 to 59 years age group | 2009 | 26106981 | 296246 | 2671 |
| 2015 | 25425668 | 281710 | 2730 | |
| % change | -2.6 | -4.9 | 2.2 | |
| Above 60 years age group | 2009 | 25240777 | 298210 | 2764 |
| 2015 | 29678861 | 342175 | 3101 | |
| % change | 17.6 | 14.7 | 12.2 |
Source: Gavop.com and Census Bureau