B26, B-26 or B.26 may refer to:

• A-26 Invader, by Douglas Aircraft Company, which carried the designation "B-26" from 1948 until 1962 and then reverted to the A-26 designation
• B-26 Marauder, by Glen L Martin Company, which carried the designation "B-26" from 1941 until 1948
• BAM B26, a pellet gun manufactured in China
• Sicilian Defence, Encyclopaedia of Chess Openings

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