Rio Arriba County, New Mexico Genealogy
1852--Rio Arriba County was created 9 January 1852 as an original county. County seat: Tierra Amarilla 
Rio Arriba County, New Mexico was created in 1850 as an original county in the Northern district of the Territory of New Mexico. It had become a part of the United States when the Mexican War ended in 1848 with the signing of the Guadalupe Hidalgo Treaty. Rio Arriba County shares its northern border with the Southern border of Colorado. West of Rio Arriba County is San Juan County, which connects with the states of Arizona, Utah, and Colorado and creates the “Four Corners” area. The Rio Arriba county seat is Tierra Amarilla. The headwaters of the Rio Chama River is a few miles southwest of Tierra Amarilla, which flows into the Rio Grande River near Santa Fe, the county seat of Santa Fe County.
Rio Arriba has two county seats: P.O. Box 158, Tierra Amarilla 87575 and P.O. Box 1256, Espanola 87532-1256 
Family History Centers
Espanola New Mexico
1101 Fairview Dr
Espanola, Rio Arriba, New Mexico, United States
Hours: W, 7pm-9pm, T, 9am-11am
Attention: For special appointments, call 505-852-0484
This is not a mailing address. Due to limited staff, Family History Centers are unable to respond to mail inquiries.
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