| Updated: | May 30, 2019 |
| Prevseason: | 2017–18 |
| Nextseason: | 2019–20 |
| Season: | 2018–19 |
| Champions: | Cibona (19th title) |
| Semifinalists: | Split Zadar |
| Promoted: | Dubrava Sonik-Puntamika |
| Relegated: | Bosco |
| Teams: | 12 |
| Duration: | October 6, 2018 – April 20, 2019 April 23, 2019 – May 30, 2019 |
| Tv: | HRT Arena Sport |
| Top Seed: | Zadar |
| Finals Mvp: |  Damir Markota |
| Top Scorer: | Hrvoje Vučić (Alkar) |
| Ppg: | 17.6 |
| Ppg N: | HRV |
| Rebounds Leader: | Abdul-Malik Abu (Vrijednosnice Osijek) |
| Rpg: | 9.1 |
| Rpg N: | NGR |
| Assists Leader: | Mario Ihring (Vrijednosnice Osijek) |
| Apg: | 6.7 |
| Apg N: | SVK |
| Biggest Home Win: | Šibenik 115–62 Hermes Analitica |
| Biggest Away Win: | Bosco 67–107 Cibona |
| Highest Attendance: | 4,000 Zadar 94–72 Šibenik |
The 2018–19 HT Premijer liga was the 28th season of the HT Premijer liga, the highest professional basketball league in Croatia. It started on October 6, 2018 and finished on May 30, 2019.
As in the previous season, all participants in Premijer liga including teams that play ABA League joined the regular season. It was played with a double round-robin format where the eight first qualified teams joined the playoffs, while the penultimate will be play relegation playoffs and last qualified one was relegated.
| Team | Coach | City | Venue | Capacity | |
|---|---|---|---|---|---|
| Adria Oil Škrljevo | Damir Rajković | Škrljevo | Dvorana Mavrinci | ||
| Alkar | Srđan Helbich | Sinj | Sportska dvorana Ivica Glavan Ićo | ||
| Bosco | Matija Brkljačić | Zagreb | Sportska dvorana Trnsko | ||
| Cedevita | Dražen Orešković | Zagreb | Dom sportova | ||
| Cibona |  Ivan Velić | Zagreb | Dražen Petrović Hall | ||
| Josip Sesar | Dvorana srednjih škola Velika Gorica | ||||
| Hermes Analitica | Zvonimir Mravak | Zagreb | Dražen Petrović Hall | ||
| Split | |||||
| Šibenik | Miro Jurić | Šibenik | Sportska dvorana Baldekin | ||
| Vrijednosnice | Domagoj Kujundžić | Osijek | Gradski vrt Hall | ||
| Zabok | Ivan Tomas | Zabok | Zabok Sports Hall | ||
| Zadar | Ante Nazor | Zadar | Krešimir Ćosić Hall |
| Teams that play in the 2018–19 First Adriatic League | ||
| Teams that play in the 2018–19 Second Adriatic League | ||
| Teams that play in the 2018-19 Alpe Adria Cup |
| Team | Outgoing manager | Date of vacancy | Position in table | Replaced with | Date of appointment | Ref. | |
|---|---|---|---|---|---|---|---|
| Šibenik | 10 May 2018 | Pre-season | 11 May 2018 | [1] [2] | |||
| Split | 28 May 2018 | 28 May 2018 | [3] | ||||
| Cedevita | 6 June 2018 | 8 August 2018 | [4] [5] | ||||
| Cibona | 6 June 2018 | 8 June 2018 | [6] [7] | ||||
| Zadar | 21 June 2018 | 28 June 2018 | [8] [9] | ||||
| Zabok | Ivan Perinčić | 25 July 2018 | Ivan Tomas | 9 August 2018 | [10] [11] | ||
| Zadar | 23 October 2018 | 3rd (2–1) | 24 October 2018 | [12] [13] | |||
| Cedevita | 25 October 2018 | 1st (3–0) | Ivan Kapov | 26 October 2018 | [14] | ||
| Cedevita | Ivan Kapov | 21 December 2018 | 4th (7–4) | 21 December 2018 | [15] | ||
| Bosco | Matija Brkljačić | 6 January 2019 | 12th (1–10) | 6 January 2019 | |||
| Vrijednosnice | 9 January 2019 | 8th (5–6) | Domagoj Kujundžić | 11 January 2019 | |||
| Split | 5 March 2019 | 4th (10–5) | 5 March 2019 | ||||
| Bosco | 8 March 2019 | 12th (1–14) | Matija Brkljačić | 8 March 2019 |
Quarterfinals and semifinals will be played in a best-of-three-games format, while the finals in a best-of-five one.
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As of the 2018–19 season, team who lost the 2018–19 First League final and the 11th placed team of the 2018–19 Premijer liga season will play in the Qualifiers for a spot in the 2019–20 Premijer liga season.
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