Northern New Mexico may simply mean the northern part of New Mexico

New Mexico

New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

, but in cultural terms it usually means the area of heavy Spanish

Spain

Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

 settlement in the north-central part.

The traditional southern boundary of the area is an escarpment called La Bajada southwest of Santa Fe

Santa Fe, New Mexico

Santa Fe is the capital of the U.S. state of New Mexico. It is the fourth-largest city in the state and is the seat of . Santa Fe had a population of 67,947 in the 2010 census...

. 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

U.S. Route 285

U.S. Route 285 is a north–south United States highway, running 845 miles through the states of Texas, New Mexico and Colorado. The highway's northern terminus is in Denver, Colorado, at exit 201 on Interstate 25. Its southern terminus is in Sanderson, Texas at an intersection with U.S....

 and 84

U.S. Route 84

U.S. Route 84 is an east–west United States highway. It started as a short Georgia-Alabama route in the original 1926 scheme, but now extends all the way to Colorado. The highway's eastern terminus is a short distance east of Midway, Georgia, at an intersection with I-95. The road continues...

, and northeast about 20 miles (30 km) east of Interstate 25

Interstate 25

Interstate 25 is an Interstate Highway in the western United States. It is primarily a north–south highway. I-25 stretches from Interstate 10 at Las Cruces, New Mexico, , to Interstate 90 in Buffalo, Wyoming, .Interstate 25 is the main north–south expressway through...

, to the Colorado

Colorado

Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...

 border. The area might also be described roughly as comprising Rio Arriba

Rio Arriba County, New Mexico

-2010:Whereas according to the 2010 U.S. Census Bureau:*51.6% White*0.5% Black*16.0% Native American*0.4% Asian*0.0% Native Hawaiian or Pacific Islander*3.3% Two or more races*28.2% Other races*71.3% Hispanic or Latino -2000:...

, Los Alamos

Los Alamos County, New Mexico

-2010:Whereas according to the 2010 U.S. Census Bureau:*87.8% White*0.6% Black*0.8% Native American*6.0% Asian*0.0% Native Hawaiian or Pacific Islander*2.6% Two or more races*2.2% Other races*14.7% Hispanic or Latino -2000:...

, Taos

Taos County, New Mexico

-2010:Whereas according to the 2010 U.S. Census Bureau:*68.7% White*0.4% Black*6.2% Native American*0.7% Asian*0.0% Native Hawaiian or Pacific Islander*3.9% Two or more races*20.1% Other races*55.8% Hispanic or Latino -2000:...

, and Colfax

Colfax County, New Mexico

-2010:Whereas according to the 2010 U.S. Census Bureau:*83.8% White*0.5% Black*1.5% Native American*0.4% Asian*0.1% Native Hawaiian or Pacific Islander*3.6% Two or more races*10.1% Other races*47.2% Hispanic or Latino -2000:...

 Counties; northeastern Sandoval County

Sandoval County, New Mexico

-Indian reservations:Sandoval County has 12 Indian reservations and two joint-use areas lying within its borders, the second most of any county in the United States -Indian reservations:Sandoval County has 12 Indian reservations and two joint-use areas lying within its borders, the second most of...

, northern Santa Fe County

Santa Fe County, New Mexico

-2010:Whereas according to the 2010 U.S. Census Bureau:*76.2% White*0.9% Black*3.1% Native American*1.2% Asian*0.1% Native Hawaiian or Pacific Islander*3.6% Two or more races*14.9% Other races*50.6% Hispanic or Latino -2000:...

; and western San Miguel

San Miguel County, New Mexico

-2010:Whereas according to the 2010 U.S. Census Bureau:*66.6% White*1.4% Black*1.7% Native American*0.8% Asian*0.1% Native Hawaiian or Pacific Islander*3.9% Two or more races*25.5% Other races*76.8% Hispanic or Latino -2000:...

 and Mora

Mora County, New Mexico

-2010:Whereas according to the 2010 U.S. Census Bureau:*70.9% White*0.7% Black*1.3% Native American*0.3% Asian*0.0% Native Hawaiian or Pacific Islander*3.3% Two or more races*23.5% Other races*81.0% Hispanic or Latino -2000:...

 Counties, possibly with parts of adjoining counties. To the west is the Four Corners region; to the east is "Little Texas".