California Counties Map (1990 Boundaries) - U.S. Census Bureau #1631466 (License: Personal Use)

This black-and-white line map displays all 58 counties of California with precise political boundaries valid as of January 1, 1990, sourced from the U.S. Bureau of the Census. Latitude and longitude lines are marked at one-degree intervals, and a dual-scale bar (kilometers and miles) is included for reference, along with a north arrow and adjacent state labels (Oregon, Nevada, Arizona, Mexico). The map also notes county seats with parentheses and identifies major cities like Los Angeles, San Diego, and San Francisco.

Used in historical geographic research, government archives, educational resources, and genealogical studies to verify jurisdictional boundaries during the early 1990s; serves users seeking authoritative vintage cartographic data for legal, demographic, or academic purposes.