PROBLEM:  Many voices within the planning community have called for replacement of the dominant model of suburban development with a more traditional style of development. Traditionally designed communities, featuring a mix of residential and commercial land uses and pedestrian connections between these uses, offer many potential environmental, social, and health benefits. Adoption of policies that encourage traditionally designed communities depends in part on public support, but evidence on the extent and nature of such support is largely anecdotal.  PURPOSE:  The purpose of this study was to assess trends in public support for traditionally designed communities and to provide insights into factors associated with that support.  METHODS:  The study uses data from comparable surveys of nationally representative samples of American households in 2003 and 2005. The surveys described a traditionally designed community and asked respondents, “How much would you support the development of communities like this in your area?” The survey also included questions on respondents' sociodemographic characteristics, attitudes on a variety of issues, expectations about the likelihood traditionally designed communities would have certain characteristics, and how important these characteristics were to them.  RESULTS AND CONCLUSIONS:  In 2003, 44% of respondents expressed support for developing traditionally designed communities in the areas where they lived. This support increased significantly to 59% in 2005. Support was strong among all groups except rural residents, and increased among all groups between 2003 and 2005. This support was positively related to expectations that such communities would be child-friendly and negatively related to expectations that they would have space limitations. Respondents perceived such communities as likely to allow older people to live independently, and they also rated this characteristic as highly important.  TAKEAWAY FOR PRACTICE:  Public support for developing traditionally designed communities is strong, widespread, and growing. Although such communities find less support in rural areas and raise concerns over limited space, they have appeal as child- and elderly-friendly places. Though there is evidence that supply of traditionally designed communities does not meet demand, this evidence of growing support may foster policy changes that will help to close the gap.