It　was　found　that　polyurea　coating　could　improve　the　integrity　and　the　corresponding　durability　of　the　structural　components.　However,　the　strengthening　effect　of　polyurea　coatings　for　structures　built　with　emerging　ultra-high-performance　concrete　(UHPC)　is　still　unknown　due　to　the　lack　of　studies.　Therefore,　this　paper　investigated　the　effect　of　the　polyurea　coating　on　the　lateral　impact　resistance　of　UHPC　columns　through　a　combined　numerical　and　experimental　study.　A　total　of　five　specimens　were　fabricated,　including　two　UHPC　columns　and　three　UHPC　columns　with　polyurea　coating.　To　better　characterize　the　structural　response　under　dynamic　loading,　impact　cases　with　different　drop　weight　impact　heights　and　axial　force　ratios　were　employed.　The　results　showed　that　the　UHPC　column　with　polyurea　coating　exhibited　superior　lateral　impact　resistance　compared　to　the　UHPC　column.　The　presence　of　the　axial　force　increased　the　lateral　impact　stiffness　and　further　reduced　the　deflection　of　the　specimen.　In　contrast,　the　polyurea　coating　improved　the　specimen＇s　ductility　and　mitigated　the　peak　impact　force,　thereby　maintaining　the　specimen＇s　integrity　without　sudden　shear　failure.　A　three-dimensional　finite　element　(FE)　model　of　polyurea-coated　UHPC　columns　under　impact　loading　was　then　established　and　confirmed　the　experimental　results.　With　the　validated　FE　model,　an　intensive　parametric　study　was　conducted　to　investigate　the　effects　of　polyurea　thickness,　axial　force　ratio　and　impact　energy　on　the　lateral　impact　resistance　of　the　UHPC　column.　The　presence　of　the　polyurea　coating　could　significantly　improve　the　lateral　impact　resistance　of　the　specimen,　thereby　preventing　the　shear　failure　of　the　UHPC　column,　and　thus,　the　effective　thickness　of　the　polyurea　layer　for　the　UHPC　column　was　determined　to　be　2-6　mm.　The　outcome　of　this　research　demonstrates　the　great　merits　of　polyurea　coating　in　improving　the　ductility　and　integrity　of　the　UHPC　column　under　lateral　impact　loading.