Frank Hague was an American Democratic Party politician who served as the Mayor of Jersey City from 1917 to 1947, Democratic National Committeeman from New Jersey from 1922 until 1949, and Vice-Chairman of the Democratic National Committee from 1924 until 1949. During his 30 years as mayor, Hague established reforms and innovations that upgraded the city's infrastructure and services, including the construction of parks, schools, and public housing. He also worked to secure funding for public works projects and attracted new businesses to the city, which helped to boost its economy. Simultaneously Mayor Hague had a dark reputation for corruption, extortion and bossism and has been called "the grandaddy of Jersey bosses". By the time he left office in 1947, he enjoyed palatial homes, European vacations, and a private suite at the Plaza Hotel. His wealth has been estimated to have been over $10 million at the time of his death, although his City salary never exceeded $8,500 per year and he had no other legitimate source of income.

The Mayor of the City of Jersey City is the head of the executive branch of the government of Jersey City, New Jersey, United States. The mayor has the duty to enforce the municipal charter and ordinances; prepare the annual budget; appoint deputy mayors, department heads, and aides; and approve or veto ordinances passed by the City Council. The mayor is popularly elected in a nonpartisan general election. The office is held for a four-year term without term limits, although the current term is a four-and-a-half-year term, due to a change in election dates.