The 2010 Dodd–Frank Wall Street Reform and Consumer Protection Act called for a government study of the regulatory options for on-line Peer-to-Peer lending. On-line P2P sites, most notably for-profit sites Prosper.com and LendingClub.com, offer individual “investors” the chance to lend funds to individual “borrowers.” The sites promise lower interest rates for borrowers and high rates of return for investors. In addition to the media attention such sites have generated, they also raise significant regulatory concerns on both the state and federal level. The Government Accountability Office report produced in response to the Dodd–Frank Act failed to make a strong recommendation between two primary regulatory options—a multi-faceted regulatory approach in which different federal and state agencies would exercise authority over different aspects of on-line P2P lending, or a single-regulator approach, in which a single agency (most likely the new Consumer Financial Protection Bureau) would be given total regulatory control over on-line P2P lending. After discussing the origins of on-line P2P lending, its particular risks, and its place in the broader context of non-commercial lending, this paper argues in favor of a multi-agency regulatory approach for online P2P that mirrors the approach used to regulate traditional lending.