  We present experimental constraints on the spin-dependent WIMP-nucleon
elastic cross sections from the total 129.5 kg-year exposure acquired by the
Large Underground Xenon experiment (LUX), operating at the Sanford Underground
Research Facility in Lead, South Dakota (USA). A profile likelihood ratio
analysis allows 90% CL upper limits to be set on the WIMP-neutron (WIMP-proton)
cross section of $\sigma_n$ = 1.6$\times 10^{-41}$ cm$^{2}$ ($\sigma_p$ =
5$\times 10^{-40}$ cm$^{2}$) at 35 GeV$c^{-2}$, almost a sixfold improvement
over the previous LUX spin-dependent results. The spin-dependent WIMP-neutron
limit is the most sensitive constraint to date.
