| Prevseason: | 2017–18 |
| Nextseason: | 2019–20 |
| Nemzeti Bajnokság I/A | |
| Season: | 2018–19 |
| Champions: | Sopron Basket (13th title) |
| Runners Up: | Aluinvent DVTK |
| Semifinalists: | ZTE NKK UNI Győr |
| Teams: | 14 |
| Games: | 182 (regular season) |
| Dates: | 28 September 2018 - 2019 |
| Tv: | M4 Sport |
The 2018–19 Nemzeti Bajnokság I/A is the 82nd season of the Nemzeti Bajnokság I/A, the highest professional basketball league in Hungary. Sopron Basket is the defending champion.
The following 12 clubs compete in the NB I/A during the 2018–19 season. NKE-Csata was promoted to this season as champions from the Hungarian 2018–19 NB I/B.
| Team | City | Hall | Capacity | |
|---|---|---|---|---|
| BEAC | Budapest | Gabányi László Sportcsarnok | ||
| Ceglédi EKK | Cegléd | Gál József Sportcsarnok | ||
| NKE-Csata | Budapest | Ludovika Aréna | ||
| Diósgyőri VTK | Miskolc | Városi Sportcsarnok | ||
| UNI Győr | Győr | Egyetemi Csarnok | ||
| MTK-Budapest | Budapest | MTK Kosárlabda Csarnok | ||
| PEAC-Pécs | Pécs | Lauber Dezső Sportcsarnok | ||
| PINKK-Pécsi 424 | Pécs | Kozármisleny Sportcsarnok | ||
| Sopron Basket | Sopron | Novomatic Aréna | ||
| KSC Szekszárd | Szekszárd | Városi Sportcsarnok | ||
| Vasas Akadémia | Budapest | Vasas Pasaréti Sportcentrum | ||
| Zalaegerszegi TE | Zalaegerszeg | Városi Sportcsarnok |
| Team | Head coach | Team captain | Kit manufacturer | Shirt sponsor | |
|---|---|---|---|---|---|
| BEAC |  Judit Balogh | Toti Sport | tippmix | ||
| Ceglédi EKK |  Petar Janković | Toti Sport | VBW, tippmix | ||
| NKE-Csata | Krisztián Tursics | Spalding | tippmix | ||
| Diósgyőri VTK | László Cziczás | 2Rule | Aluinvent, Borsodi, Apollo Tyres, tippmix | ||
| UNI Győr |  Sandro Orlando | Spalding | CBM Cargo, tippmix | ||
| MTK-Budapest | Dorottya Nagy | Spalding | tippmix | ||
| PEAC-Pécs | Róbert Meszlényi | Peak | tippmix, Pannonpower | ||
| PINKK-Pécsi 424 | Miklós Laczka | Toti Sport | tippmix | ||
| Sopron Basket |  Roberto Íñiguez | Toti Sport | tippmix | ||
| KSC Szekszárd | Željko Đokić | Toti Sport | Tarr TV, tippmix | ||
| Vasas Akadémia | Attila Földi | Toti Sport | Car-Net, tippmix | ||
| Zalaegerszegi TE | Dávid Gáspár | Spalding | tippmix |
| Team | Outgoing manager | Manner of departure | Date of vacancy | Position in table | Replaced by | Date of appointment |
|---|---|---|---|---|---|---|
| Ceglédi EKK | László Cziczás | Signed by Diósgyőri VTK | End of 2017–18 season | Pre-season | Petar Janković | 2 May 2018[1] |
| Diósgyőri VTK | Erzsébet Ambrus | End of caretaker spell | László Cziczás | 19 June 2016[2] |
Teams in bold won the playoff series. Numbers to the left of each team indicate the team's original playoff seeding. Numbers to the right indicate the score of each playoff game.
In the quarterfinals, teams playing against each other had to win two games to win the series. Thus, if one team wins three games before all five games have been played, the games that remain are omitted. The team that finished in the higher regular season place, played the first, third (if it was necessary) games of the series at home.
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In the semifinals, teams playing against each other had to win three games to win the series. Thus, if one team wins three games before all five games have been played, the games that remain are omitted. The team that finished in the higher regular season place, played the first, third (if it was necessary) games of the series at home.
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In the finals, teams playing against each other had to win three games to win the title. Thus, if one team won three games before all five games were played, the remaining games were omitted. The team that finished in the higher regular season place, played the first, the third, and the fifth (if it was necessary) games of the series at home.
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In the series for the third place, teams playing against each other had to win two games to win the 3rd place in the final rankings of the season. Thus, if one team won two games before all three games had been played, the remaining games were omitted. The team that finished in the higher regular season place, played the first and the third (if it was necessary) games of the series at home.
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| Club | Competition | Progress |
|---|---|---|
| Sopron Basket | EuroLeague | Fourth place |
| KSC Szekszárd | Qualifying round | |
| EuroCup | Round of 8 | |
| UNI Győr | Regular season | |
| Ceglédi EKK | Regular season | |
| Diósgyőri VTK | Round of 16 |