Region
United States
155
Mexican-American Border Region
66
Mexico
9
Canada
6
Northern boundary of the United States
5
European Union countries
3
California
2
Canadian-American Border Region
2
Central America
2
China
2
Congo (Democratic Republic)
2
Pakistan
2
Southern boundary of the United States
2
Southwestern States
2
Texas
2
Aberdeen
1
Arizona
1
Brazil
1
Colombia
1
Del Rio
1
Ecuador
1
Europe
1
Guatemala
1
India
1
Laredo
1
Maryland
1
Montana
1
New Mexico
1
New York (State)
1
Oman
1
Organ Mountains Wilderness (N.M.)
1
Rio Grande Valley (Colo.-Mexico and Tex.)
1
Rwanda
1
San Diego
1
Syria
1
Tohono O'odham Nation of Arizona
1
Tri-Border Area (Argentina, Brazil, and Paraguay)
1
Venezuela
1