The 2023 Esiliiga B was the 11th season of the Esiliiga B, the third tier of Estonian football. The season began on 5 March 2023 and concluded on 12 November 2023.
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The two runners-up (or highest eligible team) from the 2023 II liiga (Jõhvi Phoenix and Saku Sporting) contested the semi-finals over two legs.
The semi-final winners and second highest-ranked II liiga team (Harju II) advanced to each face either the eighth or ninth-placed Esiliiga B teams (Nõmme Kalju U21 and Läänemaa) over two legs, with the two winners securing the final two places in the following season's Esiliiga B.