The 2019 Oman Cricket World Cup Challenge League B was the inaugural edition of Group B of the 2019–2022 ICC Cricket World Cup Challenge League, a cricket tournament which formed part of the qualification pathway to the 2023 Cricket World Cup. It took place in Oman, with all the matches having List A status. Initially, it was scheduled to take place between 25 November and 10 December 2019 in Hong Kong. However, citing the instability in Hong Kong, the first round of matches in League B were moved to Oman. Uganda won the series, after they won all five of their matches.