Optical　perfect　absorbers　have　attracted　much　attention　due　to　their　wide　applications　in　areas　including　optical　sensors,　energy　utilization,　and　photocatalysis.　We　present　the　design,　characterization,　and　experimental　demonstration　of　a　narrowband,　polarization-　and　angular-insensitive,　high-performance　plasmonic　metasurface　absorber　in　near-ultraviolet　region.　A　measured　absorption　peak　of　89%　is　achieved　at　the　wavelength　of　similar　to　380　nm,　though　the　calculated　results　give　near-perfect　absorption　at　the　resonance　wavelength.　Our　findings　will　promote　more　research　on　metasurface　absorbers　in　near-ultraviolet　region.　(c)　2023　Society　of　Photo-Optical　Instrumentation　Engineers　(SPIE)