According to the postal code database, the postal code of Qihe County is 25 1 100, with the first two digits of 25 representing Shandong Province, the first three digits of 1 representing Dezhou City, the fourth digit of 1 representing Qihe County, and the last two digits of 00 representing specific delivery areas.

Qihe County, located on the left bank of the lower reaches of the Yellow River, is a yellow alluvial plain, with the terrain decreasing from southwest to northeast, and the Yellow River passes through it. It is located in the temperate monsoon region and belongs to the monsoon continental climate. Located at the southernmost tip of Dezhou City, Shandong Province, with a total area of 14 165438 square kilometers. By the end of 2022, the registered population of Qihe County was 635,000.