Slender Nation is one of the most expansive Internet communities based around the Slender Man and the mythos. It is currently home to 1,000+ users. It is one of the central hubs for Slender Man discussion, ARG and slenderblog theories, and mythos creation. The leadership of the forums takes proactive action to be involved in the community, get information regarding the ARGs and slenderblogs, and inform the members of activities in the Slender Man creators' actions. The site's wiki is located at here and the site is located here.

Slender Nation has 3 main Slender Man mythos general Discussion Sub forums: The Slender Man Mythos, Slender Man Media and Slender Man Roleplay.

The Community also has its own Podcast, Youtube and Tinychat.