2023–24 Belgian National Division 1

The 2023–24 Belgian National Division 1 was the eighth season of the third-tier football league. The league began on 30 August 2023 and ended on 12 May 2024. This was the final season in the league's current format and from the following season, it split into a Flemish (VV) and Francophone (ACFF) division.

Out
Six teams moved to another level:
 * Patro Eisden Maasmechelen was promoted as champions of the previous season.
 * RFC Liège and Francs Borains took up the two remaining promotion spots and moved up to the 2023–24 Challenger Pro League as well.
 * Ninove, Rupel Boom and Mandel United were relegated after finishing in the bottom three positions. Ninove dropped voluntarily and would have been relegated in any case, irrespective of their position.

In
Four teams entered the division, three teams were promoted from the 2022–23 Belgian Division 2: finally,
 * Lokeren-Temse, winners of the Belgian Division 2 VV A.
 * Cappellen, winners of the Belgian Division 2 VV B.
 * Union Namur, runner-up of the Belgian Division 2 ACFF as champions Warnant did not apply for a licence.
 * Virton were relegated from the 2022–23 Challenger Pro League.

Format changes
The league was reduced from 20 to 18 teams, resulting in a regular season of 34 matches. For this season only, no playoffs will be organized, as the league will split into a Flemish (VV) and Francophone (ACFF) division, with 16 and 12 teams respectively. As a result, at the end of the season: As a result the number of relegating teams is uncertain and might be zero, one or two.
 * the top two teams will be promoted (assuming they have obtained a valid license)
 * the lowest finishing team from VV side will be relegated in case they finish in 16th or lower. If the lowest finishing team from VV side finishes higher than 16th, it will take part in a playoff with a (VV) team from the 2023–24 Belgian Division 2, unless the two promoting teams from the 2023–24 Belgian National Division 1 are both from ACFF side and the two relegating teams from the 2023–24 Challenger Pro League are both from VV side, then the lowest finishing VV team will be relegated directly irrespective of its finishing position and no playoffs will be held.
 * the lowest finishing team from ACFF side will be relegated only if it finishes in position 18.

Top scorers
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