This book presents a comprehensive statistical overview of Delaware County, Pennsylvania, for the year 1997. It compiles data from various governmental and private sources to provide a detailed snapshot of the county's demographic, economic, and social characteristics. The work aims to serve as a vital resource for researchers, policymakers, and anyone seeking in-depth information about the county's condition at that time.

The Pennsylvania County Data Book series is generally regarded as a factual and essential reference for understanding regional statistics. This particular volume, focusing on Delaware County in 1997, would have been utilized by local government officials, urban planners, and academic researchers needing precise demographic and economic figures for that period. Its value lies in its systematic compilation of data that might otherwise be scattered across numerous disparate sources.