The Heritage Center maintains a collection of maps which show Fresno County and its towns throughout various stages of their respective evolutions. Of prime importance are:

  • Thomas H. Thompson Atlas of Fresno County (1891)
  • William H. Harvey Atlas of Fresno County (1907)
  • Progressive Atlas of Fresno County (1935)
  • California Agri-Land, Fresno County (various years, 1978-2007)

These volumes survey the county by township and indicate the names of rural property owners. Also included in the Heritage Center's collection are:

  • Fresno County real estate atlases, 1966 - 1981

Online map sources that include Fresno County:

Sanborn Maps :

For charting the block-by-block growth of Fresno County towns and cities, the Sanborn fire insurance maps display information found nowhere else. Utility lines, property dimensions, building specifications/modifications, and much other historically useful data are available on these maps. See a list of the Sanborn maps covering Fresno County. The Room has copies of three original Sanborn atlases for Fresno proper, and microfilm copies of atlas plates for Fresno and other county cities and towns.

Digital Sanborns available via Library of Congress are: