Abstract: LHCb is a dedicated heavy flavour physics experiment at the LHC, but with good performance of tracking and muon detectors, LHCb also significantly contributed to the precision electroweak measurements. Furthermore, the measurements from LHCb are also complementary to these from ATLAS and CMS, with unique detector acceptance.

In this talk, I will present the latest LHCb measurements of forward Electroweak Boson Production using proton-proton collisions recorded in LHC Run-1. These results make use of LHCb's excellent integrated luminosity determination to provide constraints on the parton distribution functions which describe the inner structure of the proton, and provide stringent tests on the SM predictions. This talk also presents a measurement of the forward-backward asymmetry (A_FB) in Z boson decays to two muons, which is currently most precise determination of weak mixing angle at the LHC. Finally, future prospects will be presented.