Many postsecondary institutions utilize learning communities to increase social engagement and attachment to the college community. In recent years, these communities have proliferated as part of a trend fueled by low retention and persistence rates, increasing reluctance of 4-year institutions to provide remedial education, and pressure on colleges to be accountable for their outcomes. This article reports the findings of a randomized experiment of a learning communities program that operated in an urban community college. The 1-semester learning community, which focused largely on remedial English, had modest effects on full-time enrollment, the number of courses attempted and passed, remedial English pass rates, and credits earned during the semester in which it operated. Impacts diminished in postprogram semesters. (Contains 9 tables and 9 footnotes.)