POLYMER COMPOSITION, CROSSLINKED POLYMER, AND TIRE

There is provided a polymer composition using which a molded product having excellent balance between rigidity, wear resistance, viscoelastic properties, and heat resistance can be obtained.A polymer composition according to the disclosure includes (A) a conjugated diene rubber (where, a polymer corresponding to the following component (B) is excluded); and (B) a hydrogenated product of a polymer that satisfies the following (1) to (3), which is a polymer in which 80% or more of structural units derived from butadiene are hydrogenated:(1) being a copolymer of a conjugated diene compound containing butadiene and an aromatic vinyl compound,(2) including a polybutadiene block having a vinyl group content of 20% or less, and(3) including a block composed of a conjugated diene compound and an aromatic vinyl compound.