| United States | Montana | Petroleum County | ||
|---|---|---|---|---|
| Total owner occupied | 2009 | 75320422 | 257118 | 158 |
| 2015 | 74712091 | 275063 | 143 | |
| % change | -0.8 | 7.0 | -9.5 | |
| Below 35 years age group | 2009 | 9171992 | 27670 | 13 |
| 2015 | 7433016 | 28001 | 0 | |
| % change | -19.0 | 1.2 | -100.0 | |
| 35 to 44 years age group | 2009 | 14800672 | 41771 | 24 |
| 2015 | 12174546 | 38897 | 21 | |
| % change | -17.7 | -6.9 | -12.5 | |
| 45 to 59 years age group | 2009 | 26106981 | 95238 | 50 |
| 2015 | 25425668 | 91187 | 48 | |
| % change | -2.6 | -4.3 | -4.0 | |
| Above 60 years age group | 2009 | 25240777 | 92439 | 71 |
| 2015 | 29678861 | 116978 | 74 | |
| % change | 17.6 | 26.5 | 4.2 |
Source: Gavop.com and Census Bureau