2023–24 CONCACAF Nations League B

The 2023–24 CONCACAF Nations League B was the second division of the 2023–24 edition of the CONCACAF Nations League, the third season of the international football competition involving the men's national teams of the 41 member associations of CONCACAF. It was held from 7 September to 21 November 2023.

Format
Unlike Leagues A and C, League B maintained the same format as in previous editions. League B consisted of sixteen teams which were split into four groups of four teams. The teams competed in a home-and-away, round-robin format over the course of the group phase, with matches being played in the official FIFA match windows in September, October and November 2023. The first-placed team of each group was promoted to the 2024–25 CONCACAF Nations League A and the fourth-placed team of each group was relegated to the 2024–25 CONCACAF Nations League C.

Teams
A total of sixteen national teams contested the League B, including twelve sides from the 2022–23 season and four promoted from the 2022–23 League C. As a result of the expansion to 16 teams in the League A, there were no teams relegated to the League C from the previous season, so the fourth placed team of each group from the 2022-23 season remained in the League B for this edition.

Team changes
The following were the team changes of League B from the 2022–23 season:

Nicaragua had originally qualified for promotion to League A as League B Group C winners, but they were disqualified for fielding an ineligible player. As a result, on 12 June 2023, they were replaced by Trinidad and Tobago in League A, and they were forced to stay in League B, replacing Trinidad and Tobago.

Teams promoted from League C
Saint Kitts and Nevis and Saint Lucia returned to the League B after a one-season absence. Puerto Rico and Sint Maarten reached the second division of the CONCACAF Nations League for the first time after spending the first two seasons in League C.

Seeding
The pots were confirmed on 2 May 2023, with the sixteen League B teams being split into four pots of four teams, based on the CONCACAF Rankings as of 31 March 2023.

Draw
The groups draw was held on 16 May 2023, 19:00 EDT, in Miami, Florida, United States, where the sixteen involved teams were drawn into four groups of four. The draw began by randomly selecting a team from Pot 1 and placing them in Group A and then selecting the remaining teams from Pot 1 and placling them into Groups B, C and D in sequential order. The draw continued with the same procedure done for the remaining pots.

The draw resulted in the following groups:


 * Note

Groups
The fixture list was confirmed by CONCACAF on 6 July 2023. All match times are in EDT (UTC−4) for September and October matches and EST (UTC−5) for November matches, as listed by CONCACAF (local times, if different, are in parentheses).