William King Hale was an American political and crime boss in Osage County, Oklahoma, who was responsible for the Osage Indian murders, for which he was later convicted. He made a fortune through cattle ranching, contract killings, and insurance fraud.

In politics, a boss is a person who controls a faction or local branch of a political party. They do not necessarily hold public office themselves; most historical bosses did not, at least during the times of their greatest influence. Numerous officeholders in that unit are subordinate to the single boss in party affairs. Bosses may base their power on the support of numerous voters, usually organized voting blocs, and manage a coalition of these blocs and various other stakeholders. When the party wins, they typically control appointments in their unit, and have a voice at the higher levels.