Dorchester County, SC

History

Dorchester County is named for its first settlement area, which was established by Congregationalists in 1696. These settlers applied the name "Dorchester" after their last residence in Dorchester, Massachusetts.

Dorchester was not established as a separate county until 1897. However, when it was separately established, it came from parts of the neighboring Colleton and Berkeley counties.
Source: Wikipedia

Modern Day Adjacent Counties

Bamberg County - west
Berkeley County - east
Charleston County - southeast
Colleton County - southwest
Orangeburg County - northwest

Gleanings from