In order to formulate and implement a community-based suicide prevention program, as well as evaluate the effectiveness of these programs, it is necessary to understand the epidemiological characteristics of self-harm. Clinical data were collected from the National Emergency Department Information System (NEDIS) data panel in Korea for patients seen after self-harm episodes. Socioeconomic factors were collected from Statistics Korea. Variables representing SP provisions (SPPs) were collected from the Korea Foundation for Suicide Prevention. Increasing the number of mental health providers resulted in lower annual emergency department visit rate after self-harm (VRSH) in the entire population, as well as in both the young and elderly populations. An increase in the mental health budget led to a significant reduction in VRSHs. However, the number of suicide prevention centers did not have any significant association with the VRSH. This study also provides substantial evidence that community-based SPPs are effective in preventing self-harm. Supplementary Information The online version contains supplementary material available at 10.1007/s10597-022-01077-8.