Vestas will install 14 V112-3MW turbines on the Ogorje project in the south of Croatia. Delivery of the turbines is set for the third quarter of the year, with commissioning due by the end of the year.
The deal includes a 10-year operations and maintenance contract.
Vestas has previously won contracts from French developer Akuo for the supply of turbines to three projects in Uruguay.
GE also announced a contract win in Croatia this week, with Austrian developer RP Global chosing its turbines for its Rudine project near the southern city of Dubrovnik.
Croatia has an installed wind capacity of 227MW, with 86MW coming online last year. As a member of the EU, the country must comply with binding renewable-energy targets. However, a ban on the construction of wind projects along much of its coastline has hindered progress.