Ottawa Torah Institute is a Yeshiva high school located in Ottawa providing secular and Judaic education. Founded in 1982 as a boys' school, it is Ottawa's first and only full-time Jewish high school. In 1990 the high school expanded to include a girls' division, known as Machon Sarah. Graduates from Ottawa Torah Institute earn an Ontario Secondary School Diploma.
Rabbi Eliezer Ben-Porat was head of school for twenty five years. The school was later run by the team of Rabbi Yaakov Moshe Harris (from 2013 to 2019) and Rabbi Dovid Mandel (from 2013 - 2018). It was headed by Rabbi Baruch Dov Perton. from 2018-2021. Rabbi Michael Fine now heads it (2021-present).