California

Although some 6,244 state-sanctioned operations were logged from 1907 to July of 1925, three-fourths of these were in just one state: California. California, which boasted the country's most activist eugenic organizations and theorists, proudly performed 4,636 sterilizations and castrations in less than two decades. Under California's sweeping eugenics law, all feebleminded or other mental patients were sterilized before discharge, and any criminal found guilty of any crime three times could be asexualized upon the discretion of a consulting physician. But even California's record was considered by leading eugenicists to be "very limited when compared to the extent of the problem."

--Edwin Black, "War Against The Weak: Eugenics And America's Campaign To Create A Master Race", p. 122