欧帕提亚

The beginnings of organized football in Opatija date back to 1911, when the Opatija's branch of the Croatian Sokol movement's football section was founded, under the name of "football department of the Croatian Sokol Opatija - Volosko". The initiative came from a group of students from the Trade Academy in Vienna, similarly to Split's "Hajduk" foundation by students in Prague in the same year.

The first official match played by Opatija was on May 14, 1911, in Sušak, competing with the football section of that town's Sokol. In 1912 the Germans of Opatija founded their own team - the German football club Opatija Vorwärts. The rivalry that immediately developed between the two clubs resulted in disagreements within the Croatian Sokol, so at the suggestion of Ivan Matetić Ronjgov, later a famous composer, a separate sports club was founded from it, with the name Slavenski Športski klub Opatija (Slavic sport club "Opatija").^[]

The club changes its name again in 1919 to Hajduk and back to Športski klub Opatija in 1921, the city being now part of the Kingdom of Italy and its authorities pushing for the dropping of the "Slavic" prefix. In 1923 the club changes its name once more to Olymp, and then most players access the already existing local club of Concordia, while with new pressures by the Italian authorities Olymp is renamed into Virtus. It was not until 1936 that the government's intention to name the club with the Italian name Abbazia would be fulfilled.^[]

After World War II and the annexation of the town by communist Jugoslavia, in 1946 the new regime forces the club to become an all-round sports club like all clubs in the country, on a model copied by stalinist USSR. The lack of a playground made official performances impossible until October 31, 1948. when they play the first official match within the competition and group IV Rijeka. Since then, NK Opatija has played in the regional league, which has taken various forms and names, with more or less success.^[]

In the 1950s and in the first half of the 1960s, Opatija competed in the sub-federal Jugoslav league. From 1965 it competed in the zonska liga, which after the reorganization of the competition in the 1980s became the regional league Rijeka-Pula. They won a place in the national Republican League in 1984 until 1990.^[]

After the Croatian independence and since 1992, the club started competing in the III. HNL. Opatija played in the Croatian second division in the 96/97 and 97/98 seasons, when the system was different from today. In 2002 it took part in the qualifications for the current II. HNL league but didn't qualify.

Opatija won the 2013–14 Treća HNL West group, but instead of promotion to the second division, they decided to play in the fourth division the next season due to not meeting the licensing requirements.

It finally joined Druga HNL in 2020/21 and is playing in the league since.

The club has been playing the second division games at Kantrida stadium in Rijeka but is looking into reconstructing their own stadium to allow them to play in Opatija the 2. HNL. Currently, the stadium's pitch dimensions are only 100x64 meters, which do not meet the requirements for the second division. However, the newly proposed stadium would only have dimensions of 90x60 meters, only good enough for the fifth division. The new stadium is currently planned to be built in 2021.