The Mexican state of Zacatecas held an election on Sunday, 4 July 2004.
At stake was the office of the Zacatecas State Governor, all 30 members of the unicameral Zacatecas State Congress, and 57 mayors and municipal councils.
Turnout was in excess of 50% of the 935,548 "zacatecanos" eligible to vote.
Governor.
At the time of the election, the sitting governor was Ricardo Monreal Ávila of the Party of the Democratic Revolution (PRD). 
At 22h30, with results from 46% of the polling stations counted, the victory of Amalia García, with a 35,000 vote lead, seemed inevitable.
Municipalities.
Of the state's 57 municipalities: