[5] This led to the first large influx of white settlers in the area, causing conflict with local Native populations that eventually culminated in the Rogue River War of 1855–1856.

[10] Gilbert Gable was joined in his efforts by Siskiyou State Senator Randolph Collier, whose support led to Yreka being picked as the capital.

San Francisco Chronicle journalist Stanton Delaplane won the 1942 Pulitzer Prize for Reporting for his articles on the State of Jefferson.

By the time KSOR began building full-power stations later in the decade, it realized that the combined footprint of its translator network was roughly coextensive with the original State of Jefferson.

Based on these results, Statham introduced legislation in California[19] in an attempt to split the state, but the bill died in committee.

In the late 1990s, the movement for statehood was promoted by a group called the State of Jefferson Citizens Committee, which was originally formed in 1941.

Near the California – Oregon border, a turnout provides scenic views of the Klamath River valley and three informative display signs about the republic.

[20] With the addition of the more modern Jefferson movement (Coos and Douglas and Lake Counties in Oregon, and Humboldt, Trinity, Shasta, Lassen, Mendocino, Lake, Tehama, Plumas, Glenn, Butte, Colusa, Sierra, Sutter, Yuba, Nevada, Placer, El Dorado, Amador, Calaveras, Tuolumne, Stanislaus, and Mariposa Counties in California), the population as of the 2020 Census would be 3,138,324, making it the 33rd most populous state in the United States.

[29] On July 22, 2014, the Board of Supervisors of Sutter County unanimously adopted a resolution supporting a declaration and petition to the Legislature to withdraw from California to redress a lack of representation.

[41] In the 2016 presidential election, most of the rural California counties which would belong to the State of Jefferson were won by Republican nominee Donald Trump, whereas the losing candidate, Democrat Hillary Clinton, enjoyed support in the rest of California, especially among the low income & highly-educated urban area voters.

[47] On May 8, 2017, the pro-Jefferson group "Citizens for Fair Representation" filed a lawsuit against California Secretary of State Alex Padilla.

[48] The suit alleges that California's 1862 law limiting Senators to no more than 40, and Assembly Members to no more than 80, creates an unconstitutional imbalance of representation that precludes effective "self-governance" as protected by the 14th Amendment.

[52] The two Xs are known as the "Double Cross" and signify the two regions' "sense of abandonment" by the central state governments, in both Southern Oregon and Northern California.

[39][n 1] The gold pan that was ostensibly the first model for the state's seal is on display at the Siskiyou County Museum in Yreka, California.