79103

79103 is a United States ZIP code used by the United States Postal Service to designate a portion of Amarillo, Texas. It forms part of the city's postal infrastructure and is used for mail delivery, address validation, and regional services. The area covered by 79103 includes residential neighborhoods as well as commercial and retail zones, reflecting Amarillo's mixed urban landscape. As with other ZIP codes, 79103 is commonly referenced in demographic, marketing, and planning analyses to summarize data at a local level; however, ZIP-code boundaries do not perfectly align with municipal borders and can change over time as population and street layouts evolve.

The ZIP code system was introduced by the U.S. Postal Service in 1963 to improve mail routing and delivery efficiency. Since then, codes like 79103 have remained in use, with occasional boundary updates by the USPS or local authorities to reflect annexations and urban development. In practical terms, 79103 serves residents, businesses, and institutions located within its assigned geographic area and is used by utilities, emergency services, and navigation systems to identify the location.

See also: ZIP codes in the United States; Amarillo, Texas; Texas ZIP codes.