The International Baccalaureate program coexists with Haines City High School's main campus. In December of 2007 Haines City was approved as an IB World School and will have it's first graduating class in June of 2010. There are nearly 2000 Diploma Programme schools in the world and 670 of those are in the United States as of June 2009, both numbers increase monthly. The Diploma Program is completed during the 11th and 12th grades. The 9th and 10th grades are designed to provide a solid foundation for which students can build upon.

The International Baccalaureate Organization aims to develop inquiring, knowledgeable and caring young people who help to create a better and more peaceful world through intercultural understanding and respect. To this end the IBO works with schools, governments and international organizations to develop challenging programs of international education and rigorous assessment. These programs encourage students across the world to become active, compassionate and lifelong learners who understand that other people, with their differences, can also be right.