Open-air parties with concerts performed by local pop and entertainment stars were held in Zagreb, Split, Osijek, Rijeka, Pula, Dubrovnik and other major cities. Showers of fireworks lit up the sky during the outdoor parties welcoming 2018.
A traditional New Year Eve marathon race was held in the northern city of Varazdin.
The police reported no major incidents.
On Sunday, several Croatian towns held their traditional noon farewell parties for the outgoing 2017 year.