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Self-directed violence (SDV), comprising both non-suicidal self-injury (NSSI) and suicide, is elevated among sexual minority populations. NSSI age of onset has been shown to impact severity of SDV outcomes. Components of the Interpersonal Theory of Suicide (ITS), which includes perceived burdensomeness (PB), thwarted belongingness (TB), and acquired capability for suicide (ACS), may be useful to understanding NSSI subgroups, especially among under-researched groups such as sexual minority persons. This study examined subtypes of NSSI and associations with constructs from the ITS. A sample of 473 sexual minority young adults with a history of NSSI completed self-report measures assessing demographics, SDV, and ITS constructs. More than half of the sample (59.7%) reported engaging in NSSI during their lifetime. For suicidal thoughts and behaviors, a majority of the sample …