Abstract Early in the HIV/AIDS epidemic in the United States, relatively few women were diagnosed with HIV infection and AIDS. Today, the epidemic represents a growing and persistent health threat to women in the United States, especially young women and women of color. In 2005, the leading cause of HIV infection among African American women and Latinas was heterosexual contact. In addressing HIV prevention needs among women, community-level strategies are needed to increase consistent condom use by women and their partners and to change community norms to support safer sex behaviors. The Real AIDS Prevention Project (RAPP) is a community-based HIV prevention intervention for women and their partners. RAPP is based on a community mobilization model that involves a combination of activities, including street outreach, one-on-one discussions called stage-based encounters, role model stories, community networks, and small group activities. The objectives of RAPP are to increase consistent condom use by women and their partners and change community norms associated with perceptions of condom use and high-risk behaviors in an effort to make safer sex practice more acceptable. This paper describes the Centers for Disease Control and Prevention (CDC) Division of HIV/AIDS Prevention (DHAP) effort to nationally diffuse RAPP from March 2003 through May 2007 and lessons learned from that diffusion experience. The paper specifically discusses (1) collaborating and planning with researchers, (2) a diffusion needs assessment that was designed to assess prior implementation experiences among select agencies, (3) developing the intervention package, (4) developing and piloting training for community-based organizations (CBOs), (5) a rollout of national trainings for health departments and community-based organizations interested in implementing RAPP, and (6) ongoing quality assurance activities and the provision of technical assistance and support. RAPP has been proven effective in reducing HIV transmission risk behaviors and improving communication and negotiation skills necessary for African American women and Latinas to reduce their risk for HIV infection and improve their overall health status.