LHCb PDF measurements

The LHCb experiment covers a unique region of acceptance at forward rapidities in the high energy proton-proton collisions of the LHC. This means that measurements of particle production in LHCb are directly sensitive to the parton distribution functions at low Bj\"orken-$x$ values. Several measurements of inclusive $W$ and $Z/\gamma^{\ast}$ production with the Run-I dataset are reported in these proceedings. Further measurements of $W$ and $Z/\gamma^{\ast}$ production in association with inclusive jets and $b$- and $c$-tagged jets are also reported.