* Public schools (elementary and secondary): The Ottawa-Carleton District School Board (OCDSB) and the Conseil des écoles publiques de l'Est de l'Ontario (CEPEO) manage many elementary and secondary schools. Their websites would have the most up-to-date counts, but it's a large number (hundreds).
* Catholic schools (elementary and secondary): The Ottawa Catholic School Board (OCSB) and the Conseil scolaire de district catholique de l'Est ontarien (CSDCEO) also operate numerous schools. Again, their websites are the best source for exact numbers.
* Private schools: Ottawa has a significant number of private schools at various levels. There's no central registry making a precise count difficult.
* Post-secondary institutions: Ottawa is home to several universities and colleges (e.g., University of Ottawa, Carleton University, Algonquin College). These aren't typically considered "schools" in the K-12 sense.
To get a total, you would need to individually count the schools from each of the public, Catholic, and private school boards. This is a significant undertaking and the numbers would likely change frequently.