Congress tourism is a specific form of tourism in which the main motive of travel is active or passive participation in various gatherings and manifestations of different characters. This form of tourism implies the occasional gathering of a large number of people of the same interest, organized in tourist and urban centers that contain adequate infrastructure and special technical facilities, but also accompanying facilities that will complete their free time. Today, congress tourism is crucial for extending the tourist season and significant for the development of the tourist destination. Every year, the number of meetings and congresses increases, which increases the income of the city where it takes place. The Republic of Croatia is attractive to congress tourists because of its historical heritage, beautiful nature, high-quality accommodation, rich offer of facilities and entertainment. The leading congress destinations in Croatia are Opatija and Dubrovnik, the comparison of which will be discussed in this paper. Due to its beautiful appearance, Opatija attracts numerous local and international organizers to organize their gatherings in this city. Opatija currently has 53 congress halls that are intended for holding medium and small business gatherings. Along with the city of Opatija, Dubrovnik has numerous opportunities for organizing unique and unforgettable gatherings and congresses. Dubrovnik has 101 halls available in hotel facilities, and in 2015 it was declared one of the three best congress destinations in Central and Southeastern Europe, which shows that Dubrovnik is a high-quality congress and tourist destination. Regardless of the fact that Dubrovnik is a more distant and expensive destination, it can certainly compete with Opatija. Opatija has a long tradition in business tourism, which can provide its visitors with almost everything they need during their stay in this destination.