This paper departs from reviews of urban sociology that juxtapose competing Marxist and ecological theories, arguing instead that over the last 25 years a venerable social organization paradigm has been superseded by a fertile political economy paradigm that continues to orchestrate current research. The contributions of political economy are reviewed under six headings: historical explanation, comparative studies, socioeconomic processes, spatial relations, ethnicity and community, and political movements. The conclusion argues that urban sociology is currently in need of new directions. Some criticisms and alternatives are suggested.