The elections were held using the
double simultaneous vote method, whereby voters cast a single vote for the party of their choice for all three of the Presidency, the Senate and the Chamber of Representatives. The
President of Uruguay was elected using the
two-round system, with a run-off held when no candidate received 50% of the vote in the first round. The 30 members of the
Senate were elected by proportional representation in a single nationwide constituency. The vice president, elected on the same ballot as the president, becomes president of the Senate, with their vote being the casting one when Senate votes are tied. The 99 members of the
Chamber of Representatives were elected by
closed list proportional representation in 19 multi-member constituencies based on the
departments. Seats were allocated using the
highest averages method. ==Presidential candidates==