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An aerobic bacterium, designated as strain KD337-16^T, was isolated from the fecal samples of a black pig. It exhibited spherical, non-motile and non–spore-forming, Gram-positive cells. KD337-16^T was identified as a member of the genus <i>Micrococcus</i> through 16S rRNA gene sequencing, and its closest relatives were found to be <i>Micrococcus endophyticus</i> YIM 56238^T (99.5% similarity), <i>Micrococcus luteus</i> NCTC 2665^T (99.1%), <i>Micrococcus yunnanensis</i> YIM 65004^T (99.1%), <i>Micrococcus aloeverae</i> AE-6^T (99.1%), <i>Micrococcus antarcticus</i> T2^T (98.9%), and <i>Micrococcus flavus</i> LW4^T (98.7%). Phylogenomic trees were constructed, and strain KD337-16^T was found to form its own cluster as an independent lineage of <i>M. flavus</i> LW4^T. Between KD337-16^T and its close relatives, the average nucleotide identity, average amino acid identity, and digital DNA–DNA hybridization were below the respective species delineation thresholds at 82.1–86.6%, 78.1–86.1%, and 24.4–34.9%. The major cellular fatty acids and polar lipids were anteiso-C_15:0 and iso-C_15:0, and DPG and PG, respectively. The predominant menaquinone was MK-8(H₂). Taken together, the results indicate that strain KD337-16^T is a novel species of the genus <i>Mic</i><i>rococcus,</i> for which the name <i>Micrococcus</i> <i>porci</i> sp. nov. is proposed. The type strain is KD337-16^T (=BCRC 81318^T = NBRC 115578^T).