This paper is concerned with coastal and anthropogenic avalanche complexes of Southern Sakhalin which, according to a number of characteristic features, are identified into a specific group. Their classification is developed, based on a typization of avalanche catchments, depending on the exogenous geological processes forming them. Five subclasses are identified in the class of avalanche complexes of marine terraces, each of which constitutes the area where the avalanche catchments were formed by erosion and landslide processes, abrasion and anthropogenic activity or without any clearly pronounced effect from these processes. Within each subclass, the types of avalanche complexes are identified, which represent a number of neighboring avalanche catchments occupying the portion of the cliff bounded by streams. Parameters of avalanche processes (the volume, recurrence frequency and genetic classes of avalanches) are determined, and the avalanche’s peak pressure to an obstacle and the maximum distance of avalanche release is calculated for each of the identified avalanche complexes of Southern Sakhalin at a scale of 1:1 000 000 with the map inset for the most avalanche-hazardous portion of the western coast at a scale of 1:100 000.Keywords: avalanche, natural avalanche complex, avalanche hazard, marine terrace.