Kaštela is a town and a suburb of Split, in Split-Dalmatia County, Croatia. The town is an agglomeration of seven individual settlements which are administered as a single municipality with populations individually ranging from 3,000 to 7,000 residents. The town is located northwest of the city of Split, west of Solin and east of Trogir, on the central Dalmatian coast. With a total population of 37,794 as of 2021 census, it is the 14th largest town in the country.

Split-Dalmatia County is a central-southern Dalmatian county in Croatia. The administrative center is Split. The population of the county is 455,242 (2011). The land area is 14.106,40 km2. Split-Dalmatia County is Croatia's most rapidly urbanising and developing region, as economic opportunities and living standards are among the highest alongside capital Zagreb and Istria County.