The molecular structure of the title compound, [Ni(C10H8N2)2(H2O){Cr2O7}], contains an NiII atom with a distorted cis‐octahedral coordination formed by two chelating bi­pyridine (bipy) ligands [mean Ni—Nbipy = 2.068 (3) Å], one water mol­ecule [Ni—O = 2.086 (3) Å] and an O atom of the dichromate anion [Ni—O = 2.083 (2) Å]. One of the water H atoms is involved in the intramolecular hydrogen bond with the terminal O atom of the dichromate ligand [O⋯O 2.743 (5) Å], whereas its second H atom participates in the intermolecular hydrogen bonding [O⋯O 2.688 (4) Å]; the latter is responsible for the formation of the infinite chains stretching along the polar c axis of the crystal.