2018–19 Nemzeti Bajnokság I/B (men's handball)

The 2018–19 Nemzeti Bajnokság I/B is the 51st season of the Nemzeti Bajnokság I/B, Hungary's second tier Handball league.

Team information
There are 12–12 clubs in the 2 group, with three-three promoted teams from Nemzeti Bajnokság II.

Team changes
Promoted from 2017–18 Nemzeti Bajnokság II
 * Nagykanizsai Izzó SE (South-west)

Relegated from 2017–18 Nemzeti Bajnokság I
 * Váci KSE
 * Orosházi FKSE

Relegated to 2018–19 Nemzeti Bajnokság II
 * KK Ajka (North-west)
 * Tatabánya KC (U20)
 * Csurgói KK (U20)
 * Törökszentmiklósi KE (South)
 * MOL-Pick Szeged (South-east)

Promoted to 2018–19 Nemzeti Bajnokság I
 * Vecsés SE
 * Mezőkövesdi KC

Western Group
The following 12 clubs compete in the NB I/B (Western) during the 2018–19 season:

Eastern Group
The following 12 clubs compete in the NB I/B (Eastern) during the 2018–19 season: