Let \({\mathcal{A}}\) be a smooth continuous trace algebra, with a Riemannian manifold spectrum X, equipped with a smooth action by a discrete group G such that G acts on X properly and isometrically. Then \({\mathcal{A}}^{-1}\rtimes G \) is KK-theoretically Poincare dual to \(\big(\mathcal A {\hat {\otimes}_{C_0(X)}} C_\tau (X)\big) \rtimes G\) , where \({\mathcal{A}}^{-1}\) is the inverse of \({\mathcal{A}}\) in the Brauer group of Morita equivalence classes of continuous trace algebras equipped with a group action. We deduce this from a strengthening of Kasparov’s duality theorem. As applications we obtain a version of the above Poincare duality with X replaced by a compact G-manifold M and Poincare dualities for twisted group algebras if the group satisfies some additional properties related to the Dirac dual-Dirac method for the Baum- Connes conjecture.