Caleb Lyon (born December 7, 1811 in Greig, New York - died September 8, 1875 in Rossville, Staten Island, New York) was governor of Idaho Territory from 1864 to 1866.
In 1847 he was appointed US Consul to Shanghai, but never made it to China - instead he moved to California, and was the designer of the California State Seal adopted in 1849.
As territorial governor Lyon proved to be extremely unpopular. One journalist wrote he was "a conceited, peculiar man, who made many enemies and misappropriated much of the public funds." During Lyon's administration, the territorial capital was moved from Lewiston to Boise, reputedly because Lyon thought it was better to have the capital in a larger city.
Lyon served a single term in the United States House of Representatives from 1853 to 1855, representing New York as an independent.