The synthesis and crystal structure of the title complex are reported. Crystals are triclinic, space group P1¯ with a = 10.359(2), b = 10.742(2), and c = 13.604(2) A, α = 87.25(1), β = 88.89(1), γ = 83.63(2)°, and Z = 2. The structure was solved by the heavy atom method and refined by least squares to final R and Rw of 0.055 and 0.06 for 1707 unique reflections. The structure is comprised of planar [Se2(o-phenylenethiourea)6]4+ ions and bromide counterions with the water molecules providing extensive lattice stabilization through hydrogen bonding. The dinuclear complex arises by the fusion of two SeS4 trapezoids with each Se bonded strongly to two terminal sulfur atoms Se-S(1) = 2.306(4), Se-S(3) = 2.286(5) Å and weakly to two other bridging sulfur atoms Se-S(2) = 2.840(5) and Se-S(2)′ = 2.852(5) Å.