Ariz. Rev. Stat. § 11-107
Graham county, the county seat of which is Safford, is bounded as follows:
Commencing at a point on the east line of range eighteen east, six miles south of the intersection of such line with the second standard parallel south, being the northwest corner of Cochise county; thence due north on the east line of range eighteen east, being the eastern boundary of Pinal county, to the point where such line intersects the Gila river; thence along the Gila river to the mouth of the San Carlos river; thence up the San Carlos river to the point where such river intersects the north line of township one north; thence east along the north line of township one north which is the southern boundary of Gila county to the one hundred tenth meridian of west longitude; thence north along such meridian to the Black river; thence up the Black river to its intersection with the east boundary of the White Mountain or San Carlos Indian reservation as defined by the resurvey of 1915; thence due south along the east boundary line of such Indian reservation to the southeast corner of the reservation, as established under instructions from the United States surveyor general of Arizona in the year 1883; thence in a south southeasterly direction in a direct line to the highest point of Thumb Butte; thence in a southerly direction following the boundary survey of 1912 to the summit of the north end of the Peloncillo range of mountains; thence in a general southeasterly direction along the summit of such range, as defined by the survey of 1912, to its intersection with the north boundary line of Cochise county, the point of intersection being the township line between townships eleven and twelve south, Gila and Salt River Guide meridian; thence west along the northern boundary line of Cochise county to the place of beginning.
A.R.S. § 11-107