Time Zone: Rio Arriba County lies in the Mountain Time Zone (MST/MDT) and observes daylight saving time.
The community of Tierra Amarilla is the Seat for Rio Arriba County.
Rio Arriba County is one of the original counties of New Mexico and was founded in 1852.
From the Census Estimates for 2009, <1> Rio Arriba had a population of 40,678 people. This is a decrease of 1.24% since the last Census (which gave a population of 41,190 people in 2000).
At the time of the 2000 Census, Rio Arriba represented 2.26% of the total population of New Mexico, making it the state's 13th most populous county (out of 33 counties).
The following table shows the recent changes in population. Other than 2000, the population counts have been estimated by the Census Bureau.
Year | Population | Change Since 2000 | Year-to-Year Change |
2010 | 40,246 | -2.29% | -1.06% since 2009 |
2009 | 40,678 | -1.24% | +0.17% since 2008 |
2008 | 40,609 | -1.41% | -0.41% since 2007 |
2007 | 40,778 | -1% | |
--- | | | 2000 | 41,190 | The Last Census |
More information can be found on the Rio Arriba County Census Page for Rio Arriba County. .
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