The bus service is first class: even the smallest villages have some sort of bus connection. There are express buses which cover longer distances and are very comfortable. Bus travel is also inexpensive, and the new motorways in parts of the country have reduced journey times.

In almost every larger town, there is a bus station (Autobusna Stanica) where tickets are sold and timetables are clearly displayed.

Bus Companies in Croatia
Please see the following websites for timetable and price details. (Unfortunately, some are in Croatian only!)

AK Karlovac
APP Variety of domestic routes
Autopoduzece Imotski Routes between main cities
Autotrans Rijeka-based company
Brioni Pula-based company
Cazmatrans
Croatia Bus Zagreb-based company
Contus Services between Zadar and Zagreb
Panturist Routes from Osijek to Zagreb and the coast
Promet Split Routes in and around Split
Samoborcek Routes between Zagreb and Split

Bus Terminals in Croatia
Timetables can also be found at the following websites.

Dubrovnik Bus Terminal (Croatian only)
Split Bus Terminal
Varazdin Bus Terminal
Zagreb Bus Terminal is very useful - it provides timetables for the whole of Croatia!