[en] We have studied the lepton and quark mixing patterns which can be derived from the dihedral group D_n in combination with CP symmetry. The left-handed lepton and quark doublets are assigned to the direct sum of a singlet and a doublet of D_n. A unified description of the observed structure of the quark and lepton mixing can be achieved if the flavor group D_n and CP are broken to Z₂ × CP in neutrino, charged lepton, up quark and down quark sectors, and the minimal group is D₁₄. We also consider another scenario in which the residual symmetry of the charged lepton and up quark sector is Z₂ while Z₂ × CP remains preserved by the neutrino and down quark mass matrices. Then D₇ can give the experimentally favored values of CKM and PMNS mixing matrices.