ZIP code 45312 is officially located in the state of Ohio, primarily serving the city of Casstown. It falls under the administrative jurisdiction of Miami County. When planning mail delivery, logistics routing, or demographic research, 45312 operates within the Eastern Time (ET) timezone and supports the 292 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 45312 ZIP Code Tabulation Area is approximately 16,392. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $44,312.