  We consider black ring with a cosmological constant in the five dimensional
N=4 de Sitter supergravity theory. Our solution preserves half of the de Sitter
supersymmetries and has one rotation symmetry. Unlike the flat case, there is
no angular momentum and the stability against gravitational self-attraction is
balanced by the cosmological repulsion due to the cosmological constant. Our
solution describes a singular black ring since although it has horizons of
topology S^1 x S^2, the horizons are singular. Despite the singularity, our
solution displays some interesting regular physical properties: it carries a
dipole charge and this charge contributes to the first law of thermodynamics;
it has an entropy and mass which conform to the entropic N-bound proposal and
the maximal mass conjecture We conjecture that the Gregory-Laflamme instability
leads to a resolution of the singularity and results in a regular black ring.
