Dubrovnik-Neretva county - Dubrovačko-neretvanska županija is the southernmost Croatian and Dalmatian county. Its center is Dubrovnik; the other larger towns are Metković and Ploče in the Neretva river delta (hence the mention in the county name). It includes the larger islands of Korčula, Lastovo, Mljet, Šipan, Lopud and Koločep.

Technically, the Neum municipality of Bosnia and Herzegovina makes the southern part of this county an exclave, but they're still connected with the mainland via Croatian territorial waters. Also, all traffic going to/from Dubrovnik through Neum is usually less subjected to customs inspections to reduce the amount of traffic jams. The road (one of the main ones in Croatia) has one lane per direction. Buses joining both parts of Croatia usually stop at Neum, so that passengers can buy tobacco and alcoholic beverages with the lower Bosnia-Hercegovina taxes.

The northern part of the Mljet island is a national park, while the Baćina lakes north of Ploče are a nature park. The southernmost tip of the county includes the disputed Prevlaka peninsula.