USGenweb Archives

USGenweb Archives

Mendocino Archives

Area Resources


Mendocino County
CAGenweb Project

Mendocino County Logo

The purpose of this website is to present information that helps your Mendocino County genealogy research.

CAGenweb Project


USGenweb Project

USGenweb Logo

Mendocino County Indexes (MCI)

Note: Please use BACK (<) on your web browser to return to this home page from the MCI selections.


Mendocino County was one of the original counties of California, created in 1850 at the time of statehood. Due to an initially minor white American population, it did not have a separate government until 1859 and was under the administration of Sonoma County prior to that. Some of the county's land was given to Sonoma County between 1850 and 1860.

The county derives its name from Cape Mendocino (most of which is actually located in adjacent Humboldt County), which was probably named in honor of either Antonio de Mendoza, Viceroy of New Spain, 1535–1542 (who sent the Juan Rodríguez Cabrillo Expedition to this coast in 1542), or Lorenzo Suárez de Mendoza, Viceroy from 1580 to 1583. Mendocino is the adjectival form of the family name of Mendoza. This description was taken from a Wikipedia article about Mendocino County, which has much more detail.


There are four incorporated cities, within the county: Fort Bragg, Point Arena, Ukiah (county seat) and Willits. See more...

Adjacent Counties

In doing genealogy research it is helpful to know adjacent counties, as relatives frequently live nearby.

California Map with Mendocino highlightedView a California map with counties. Mendocino County is located in the western part of Northern California, enjoying significant coastline. See more about present day California and Mendocino County....


Starting Your Research

USGenWeb ( is a great place to begin your genealogical journey. There are many dedicated volunteers across the U.S. who cover topics you are just beginning to wonder about. This Mendocino County site was produced by Lewis M Ruddick from 1996 to early in 2017. His good work was continued by Bill George, and in June 2018, Phil Carnahan joined as co-Mendocino County Coordinator for the CAGenWeb project. Phil brings much experience in Mendocino County Genealogy, having worked on his Mendocino County indexes over many years.

In addition to the Mendocino County Indexes and the Mendocino County Historical Society Genealogy Links, the following sites should be quite helpful to your research.

State of the Web Site

This web site was updated after a change in CC in 2017. Some of the previous Mendocino County coordinator, Lewis M Ruddick's web pages, have been assembled and are called the "Mendocino Archives". Phil Carnahan's Mendocino County Indexes were re-added in 2018, after RootsWeb's outage caused them not to be available. A "snapshot" of this web site prior to 2017 can be found on the "Wayback Machine", where the Mendocino County CAGenWeb website was copied 56 times from 2001 to 2016.

There are a few placeholder links that will be gradually being filled in.

The CAGenWeb Project thanks you for visiting and hopes this website contributes to your genealogy research. ....Bill George and Phil Carnahan, Mendocino County CAGenWeb Co-Coordinators.


This web page is sponsored by the CAGenWeb Project, part of the USGenWeb Project.  Although believed to be correct as presented, if you note any corrections, changes, additions, or find that any links provided on this page are not functioning properly, please contact the Webmaster for prompt attention to the matter.

This page was last updated Friday, January 25, 2019