The Community Development Block Grant (CDBG) program is the largest of the U.S. Department of Housing and Urban Developments's formula block grant programs. This study examines whether readily available data sources can be used to track the outcomes of activities funded with CDBG. The study concludes that two data elements--median home loan amount and the number of businesses--have potential as tools for helping local communities measure the effects of concentrated CDBG expenditures, but additional research is needed. This initial work does not support the use of this methodology for a national performance measure applicable to all CDBG programs; however, these measures may be useful to communities interested in assessing their own community development performance and in furthering their understanding of the neighborhood effects of past CDBG investments.