The September 20, 2026, Berlin state election produced a preliminary seat total of 158 in the Abgeordnetenhaus under the mixed-member proportional system, with 78 single-member constituencies plus overhang and compensatory mandates to reach proportionality from a statutory base of 130. Die Linke’s 25.7% second-vote share and 28 direct wins, combined with AfD gains and losses for the CDU, Greens, and SPD, generated this exact size after five parties cleared the 5% threshold. Trader consensus at 97.5% on 158–162 reflects the Landeswahlleiter’s confirmed preliminary count, with only final certification and any minor adjustments remaining. Late shifts from recounts or legal challenges represent the primary scenarios that could still alter the outcome before resolution.