The short answer
Split is the better base; Dubrovnik is the better sight. Split has the ferry port for Hvar, Brač, Vis and Šolta, the buses for Krka, Trogir and Omiš, and four times the population of Dubrovnik — 160,577 against 41,562 at the 2021 census — which means a city that runs on its own life rather than its visitors'. Dubrovnik has the walls, the most intact old town on this coast, and very little else within an easy day. If you are staying a week, stay in Split. If you have three nights and want to be impressed every time you step outside, Dubrovnik.
Choose Split if
You want to island-hop. Split's port is the hub of central Dalmatia — Hvar is an hour away by catamaran, Brač fifty minutes by car ferry.
You want variety in day trips: Krka's waterfalls, Trogir, Omiš and the Cetina canyon, Klis fortress, even Mostar.
You want to swim in town. Bačvice, Kašjuni and Bene are a walk or a short bus ride from the palace.
You care about the bill. Split is not cheap any more, but its konobas two streets back from the water are still feeding locals.
What things actually cost: is Split expensive?
Choose Dubrovnik if
It is your first time in Croatia, you have two or three nights, and you want the postcard. The walk round the walls is one of the great city walks in Europe.
You are flying in and out of Dubrovnik and do not want to spend a day on the road.
You want to combine Croatia with Montenegro's Bay of Kotor, which is a far easier day from Dubrovnik than from Split.
The honest catch with Dubrovnik is scale. The old town is small, almost entirely given over to visitors in summer, and the city limits how many cruise ships call in a day precisely because the lanes cannot take more. It is extraordinary at seven in the morning and hard work at noon in August. Split has the same summer crowds in the palace at midday, but you can walk ten minutes in any direction and be somewhere ordinary.
Doing both
With ten days or more, do both: most of the time in Split, the last two or three nights in Dubrovnik, and fly home from there. By road it is about four to five hours by bus. Since the Pelješac Bridge opened in July 2022 the route can stay inside Croatia, though some buses still cross the short Bosnian coastline at Neum, so keep your passport or ID card to hand. In summer, catamarans run between the two via the islands in five to six hours — slower than the bus, but the better journey, and you can step off at Hvar or Korčula on the way.
The island hop starts at Split's ferry port.
Who should not base themselves in Split
Anyone whose idea of Croatia is the walls of King's Landing and nothing else, and anyone landing in Dubrovnik for only three nights. The drive north eats a day each way. Equally, a week in Dubrovnik alone is long — you will run out of easy day trips and pay Dubrovnik prices for every meal while you do.
Settled on Split? Next, where to stay in Split, by neighbourhood.
Then the island most people pick first: Hvar as a day trip.
And the city's centre of gravity: Diocletian's Palace.
Planning the length of the stay: how many days in Split.
Every day out, ranked: the best day trips from Split.
Things to do in Split
Split in two days
The best beaches in Split