Northern New Mexico
Northern New Mexico may simply mean the northern part of New Mexico, but in cultural terms it usually means the area of heavy Spanish settlement in the north-central part. However, New Mexico state government also uses the term to mean the northwest and north central, but to exclude both the northeastern high plains counties and Sandoval County. The top 5 largest cities in Northern New Mexico are: (1) Santa Fe; (2) Las Vegas; (3) Espanola; (4) Los Alamos; (5) Raton.
The traditional southern boundary of the area is an escarpment called La Bajada southwest of Santa Fe. The other boundaries are poorly defined. The map in Cobos (1983) is a guide: from La Bajada the boundary runs northwest about 50 miles (80 km) west of U.S. Routes 285 and 84, and northeast about 20 miles (30 km) east of Interstate 25, to the Colorado border. The area might also be described roughly as comprising Rio Arriba, Los Alamos, Taos, and Colfax Counties; northeastern Sandoval County, northern Santa Fe County; and western San Miguel and Mora Counties, possibly with parts of adjoining counties. To the west is the Four Corners region; to the east are the high plains of Eastern New Mexico.
New Mexico state government generally divides New Mexico into four regions: Eastern, Central, Southwestern and Northern New Mexico. For those purposes Northern includes the Four Corners area together with the cultural area, but excludes Sandoval County. The Northwest Region is frequently referred to as the "Four-Corners Region.
For tourists, New Mexico is divided into six regions, with Northern New Mexico being divided into North Central Region, Northeast Region and Northwest Region. Sandoval County is part of the Central Region to the south. Under that schema, the North Central Region includes the core part of cultural Northern New Mexico.
Northern Rio Grande National Heritage Area
The Northern Rio Grande National Heritage Area is in the Upper Rio Grande Valley and North Central Region of northern New Mexico. It is a federally designated National Heritage Area. It includes the area that has been inhabited by the Puebloan peoples since the early Pre-Columbian era. 
- Economic Research and Analysis Bureau, New Mexico Department of Workforce Solutions (January 2011). "State of New Mexico Workforce Report 2011" (PDF). State of New Mexico. pp. 8–9. Archived from the original on 15 March 2012.
- New Mexico Tourism Department (2008). "New Mexico Regions & Attractions". State of New Mexico. Archived from the original on 17 May 2008. (new page at that address no longer shows region's map)
- NPS: Northern Rio Grande National Heritage Area
- Rubén Cobos (1983). Dictionary of New Mexico and Southern Colorado Spanish. University of New Mexico Press. ISBN 0-89013-142-2. The second edition doesn't include the map.
- Jake Kosek (2006). Understories: The Political Life of Forests in Northern New Mexico. Duke University Press. ISBN 0-8223-3847-5.
- Media related to Northern Rio Grande National Heritage Area at Wikimedia Commons