This article focuses on the relationship of exclusionary zoning to the lack of affordable housing opportunities. These factors impede the efforts of people who are homeless to secure permanent housing. The authors profile homelessness and give and explain the ways zoning laws affect people who are homeless. Other topics include: exclusionary zoning and its adverse effects on the preferred free operation of the market; possible responses to exclusionary zoning ordinances; analysis of the effectiveness of current efforts to rezone in favor of low income groups; the benefits of exclusionary zoning compared to human costs; and alternatives to current zoning practices.