|Full name||Nogometni klub Opatija|
|League||Treća HNL West|
|2018–19||Treća HNL West, 8th|
The club was founded in 1911 and had an early rivalry with the German-organised team in Opatija, Vorwärts.
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.
The club has been looking into reconstructing their stadium to allow them to play in 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.
|2010–11||3. HNL West||34||13||11||10||53||42||50||7th||R1||Alen Matovina||13|
|2011–12||3. HNL West||34||15||9||10||39||38||54||4th||R1||Ratko Kremenović||9|
|2012–13||3. HNL West||30||12||7||11||51||44||43||5th||Danijel Lazić, Damir Radomir||7|
|2013–14||3. HNL West||28||20||4||4||64||30||64||1st ↓||PR||Niko Vlatković||15|
|2014–15||4. HNL Rijeka||30||17||6||7||55||27||57||2nd ↑||R2||Antun Dunković||13|
|2015–16||3. HNL West||30||13||4||13||39||45||43||9th||R2||Ivan Brozović, Alen Matovina||8|
|2016–17||3. HNL West||30||14||7||9||58||51||49||5th||Aleksandar Šolić||7|
|2017–18||3. HNL West||34||21||6||7||55||28||69||2nd||Alen Matovina||18|
|2018–19||3. HNL West||34||13||9||12||55||50||48||8th||Baltazar Anton Bogolin||11|
- League: P = Matches played; W = Matches won; D = Matches drawn; L = Matches lost; F = Goals for; A = Goals against; Pts = Points won; Pos = Final position.
- Cup: PR = Preliminary round; R1 = First round; R2 = Round of 16; QF = Quarter-final; SF = Semi-final; RU = Runner-up; W = Competition won.
- Croatian Third Football League – Division West (2): 2001–02, 2013–14
- Croatian Fourth Football League – Division West (1): 2008–09
- "O Nama". NK Opatija. Retrieved 13 January 2019.
- Volarić, Ivan (26 September 2014). "Bogolin: Grad mora shvatiti da NK Opatija nije iz Bjelovara". Novi List.
- Miličić, Dubravko (6 October 2017). "I danas se smijemo penalu koji je suđen za Dinamo". 24 Sata.
- Kirigin, Marina (3 October 2017). "NK Opatija želi igrati Drugu HNL, Grad im servira stadion za – petu". Novi List.
- Žic, Davor (December 2018). "NK Opatija požalio se na odgodu investicije u stadion – Svake godine početak radova planira se 'za dvije godine'".
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