Abstract. Let X be a homogeneous space and let E be a UMD Banach space with a normalized unconditional basis (We prove a weighted integral inequality for the vector-valued extension of the Hardy-Littlewood maximal operator and a weighted Fefferman-Stein inequality between the vector-valued extensions of the Hardy-Littlewood and the sharp maximal operators, in the context of Orlicz spaces. We give sufficient conditions on the kernel of a singular integral operator to have the boundedness of the vector-valued extension of this operator on L p (X, W dµ; E) for 1 < p < ∞ and for a weight W in the Muckenhoupt class A p (X). Applications to singular integral operators on the unit sphere S n and on a finite product of local fields K n are given. The versions of all these results for vector-valued extensions of operators on functions defined on a homogeneous space X and with values in a UMD Banach lattice are also given.