Talleyville, Delaware
![](/Images/godic/202502/15/USA_Delaware_location_map.svg1135.png")
Talleyville is an unincorporated community in New Castle County, Delaware, United States. Its ZIP Code is 19803.
The population of the ZCTA for ZIP Code 19803 was 21,022 at the 2000 census. The William Hicklen House was listed on the National Register of Historic Places in 1983.