The 2025 Esiliiga B was the thirteenth season of the Esiliiga B, the third tier of Estonian football. The season started on 28 February and finished on 9 November 2025.
The league consisted of ten teams; six teams remaining from the previous season, two teams promoted from the II liiga, and two teams relegated from the Esiliiga.
The promoted teams were the 2024 II liiga North/East champions Maardu Linnameeskond and South/West champions Nõmme United U21 (replacing the 2024 Esiliiga B bottom two teams Pärnu Jalgpalliklubi and Tulevik).
The relegated teams were the 2024 Esiliiga bottom two teams Paide Linnameeskond U21 and Tabasalu (replacing the 2024 Esiliiga B champions Tammeka U21 and runners-up Nõmme Kalju U21).
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Teams face each other four times (twice at home and twice away).
The eighth-placed team (Paide Linnameeskond U21) faced the third-placed team of the 2025 II liiga A (Tulevik) in a two-legged play-off for the final place in the 2026 Esiliiga B.
The Esiliiga B Player of the Year was awarded to Aleksandr Volkov.