Miss Earth 2004, the 4th edition of the Miss Earth pageant, was held on October 24, 2004 at the University of the Philippines Theater in Diliman, Quezon City, Philippines. Dania Prince of Honduras crowned her successor Priscilla Meirelles of Brazil at the end of the event.

The 21-year-old medical student from Brazil, Priscilla Meirelles, who stands 5’ 8" and has a 35"-24"-35" figure, won the coveted title, and with her win, Brazil became the first country in history to win in all of the Big Four international beauty pageants, namely Miss Universe, Miss World, Miss International and Miss Earth.

Miss Martinique Murielle Celimene was crowned Miss Air. Miss Water and Miss Fire were won by Miss Tahiti Kahaya Lusazh and Miss Paraguay Yanina Gonzalez, respectively.

The winners were chosen by the 11-person board of judges who included last year’s Miss Earth’s Beauty for a Cause awardee, Vida Samadzai, Noel Lorenzana of Unilever Philippines, Stefan Voogel of InterContinental Manila, Kit Ti LIan of Avon Color, Lorraine Timbol of Media Arts Systems and Services Co., Regina Paz Lopez of ABS-CBN Foundation, Chin Chin Gutierrez, actress and staunch advocate of environmental concerns, international singer-actor Leo Valdez, Deborah Landey of the United Nations Development Programme, Freddie Garcia of ABS-CBN, and Department of Trade and Industry Secretary Cesar Purisima.^{[citation needed]}

List of countries and delegates that participated in Miss Earth 2004:^[1]

Miss Earth 2004, Priscilla Meirelles also won the title "Miss Cyberpress Earth 2004" awarded by the website Globalbeauties.com after topping a survey participated in by webmasters in 19 pageant-related web portals.^[2]