Rio Arriba County, New Mexico

Rio Arriba County
County
Rio Arriba County Courthouse, Isaac Rapp, architect, 1916-17
Seal
Location within the U.S. state of New Mexico
New Mexico's location within the U.S.
Coordinates: 36°31′N 106°42′W / 36.51°N 106.7°W / 36.51; -106.7
Country	United States
State	New Mexico
Founded	1852
Named for	location on the upper Rio Grande (río arriba means "upriver" in Spanish)
Seat	Tierra Amarilla
Largest city	Española
Government
• County Manager	Jeremy G. Maestas
Area
• Total	5,896 sq mi (15,270 km2)
• Land	5,861 sq mi (15,180 km2)
• Water	35 sq mi (90 km2)  0.6%
Population  (2020)
• Total	40,363
• Density	6.8/sq mi (2.6/km2)
Time zone	UTC−7 (Mountain)
• Summer (DST)	UTC−6 (MDT)
Congressional district	3rd
Website	www.rio-arriba.org

Rio Arriba County (Spanish: Condado de Río Arriba) is a county in the U.S. state of New Mexico. As of the 2020 census, the population was 40,363.^[1] Its county seat is Tierra Amarilla.^[2] Its northern border is the Colorado state line.

Rio Arriba County comprises the Española, NM Micropolitan Statistical Area, which is also included in the Albuquerque-Santa Fe-Las Vegas, NM Combined Statistical Area.