The National Association of Organizations in the Public Interest (NAOPI) is a 501(c)(4) advocacy nonprofit entity affiliated with the 501(c)(4) members of the Public Interest Network, including the Fund for the Public Interest, and is associated with the U.S. Public Interest Research Group (US-PIRG).

NAOPI is affiliated with the National Center for the Public Interest (NCPI), which is affiliated with the 501(c)(3) members of the Public Interest Network.

Doug Phelps is president of NAOPI.