Arizona

Apache

Cochise
Coconino
*ONLY in 0016-0025

Gila
Graham
Greenlee

La Paz

Maricopa
*ONLY in 0101, 0405.02, 0507, 0611, 0822.02, 5228, and 7233
Mohave
(Although this is an MSA, the ORHP has designated it as a RURAL county)

Navajo

Pima
*ONLY in 0044.05, 0048, 0049, 0050
Pinal
*ONLY in 0001, 0002, 0004- 0012

Santa Cruz

Yavapai
Yuma
*ONLY in 0105, 0106, 0107, 0110, 0112, 0113, 0115, 0116