| 2017-12-31 | County in New Mexico or Colorado |
| 2016-08-09 | County in Colorado or New Mexico |
| 2013-08-17 | County whose seat is La Junta |
| 2012-02-16 | New Mexico county |
| 2011-12-03 | County NE of El Paso |
| 2011-09-11 | New Mexico county |
| 2011-07-28 | New Mexico county |
| 2010-11-22 | New Mexico county whose seat is Alamogordo |
| 2010-09-16 | Alamogordo's county |
| 2009-03-11 | New Mexico county |
| 2008-01-20 | Alamogordo's county |
| 2007-04-11 | Alamogordo's county |
| 2006-10-25 | New Mexico county |
| 2006-10-22 | County with the White Sands National Monument |
| 2006-08-27 | New Mexico county |
| 2006-04-06 | Alamogordo's county |
| 2005-07-31 | County whose seat is Alamogordo |
| 2000-04-15 | New Mexico county where the first atomic bomb was exploded |
| 1999-09-15 | Alamogordo's county |
| 1999-04-10 | Alamogordo's county |
| 1996-06-07 | New Mexico county |
| 1994-11-05 | New Mexico county |
| 1993-12-10 | Alamogordo's county |