To provide more and better information that can be released to the public without compromising individual company data, a new reporting system has been developed by the U.S. Bureau of Mines for reporting crushed stone and sand and gravel production within each state. The new system, implemented for the first time with the publication of the 1985 crushed stone production data, subdivides 40 states into several districts by grouping adjacent counties on which the reporting system is based. In defining the districts, factors like location and number of aggregate producers, size and location of markets, existing road systems, locations of major industries, and standard metropolitan statistical areas were considered. Consequently, most of the districts represent a market area and include more than three crushed stone or sand and gravel producers, thus allowing the publication of more production information. This publication provides a complete set of tables with production information for crushed stone and sand and gravel by districts for the 40 states in which the districting system was implemented; in the other 10 states the limited number of companies or low level of production precluded implementation of the system.