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 ∼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.