This report describes the development of the National Census of Victim Service Providers (NCVSP), including the development of the national roster of entities potentially serving victims, the NCVSP data collection instrument, and the implementation and results of a pilot study conducted with 725 entities from the national roster. Results examine the feasibility of obtaining high response rates from different types of victim service providers (VSPs), experimental tests of different procedures for collecting data from VSPs, and the quality and nature of substantive information generated from the NCVSP instrument.