File:Arizona+Territory+1881.jpg

Summary
1 Feb 1881 - Arizona created Cochise County from the eastern part of Pima County. This county named for Cochise, the great Apache warrior who had died seven years before. 8 Feb 1881 - Arizona created Gila County from lands in Maricopa and Pima County counties. This county named for the Gila River. 10 Mar 1881 - Arizona created Graham County from lands in Apache and Pima counties. This county named for Mount Graham, the highest peak in the area