St. Michael Catholic Secondary School, known locally as St. Mike's, is a Catholic secondary school located in Stratford, Ontario.

The school is one of two secondary schools in Stratford, the other being Stratford District Secondary School. St Mike's is one of two secondary schools in the Huron-Perth Catholic District School Board, the other school being St. Anne's Catholic Secondary School. The school opened in September 1986 on Grange Street, now the home of Jeanne Sauvé Catholic Elementary School, with approximately 60 students. The school moved to the Oakdale Avenue location in September 1993, with an addition to the building being added in 2006.

Approximately 1,000 students attend on an annual basis. The building is unique as it shares a library with Stratford District Secondary School, the city's public high school. A multi-use sports area named Stratford Education Recreation Complex (SERC) surrounds the buildings.