Eleven Mile Corner, Arizona, is a former settlement and Rural Postal Station now largely considered to be an unincorporated portion of the city of Casa Grande, with which it now shares a common zip code. The area was so named due to its location being (by old mile markers and former city boundaries) 11 miles to the east of Casa Grande, 11 miles north of Eloy, Arizona, and 11 miles Southwest of Coolidge, Arizona. The area came to be in the early 1940s when State Hwy 87 was cut through approximately 3 miles to the East, and the existing road (now Florence Blvd.) between Casa Grande, Coolidge, and Florence was improved and became a sub-segment and by-way of Hwy 87. A second road was cut through intersecting with Florence Blvd. (now 11 Mile Corner Rd.) connecting Eloy with the O' Odam Tash Ind