Here is the most recent Ontario COVID-19 institutional outbreak data for the 7 days starting Sunday August 31 2025 and ending Saturday September 6 2025.
During surveillance week 36 in 2025, there were approximately 23 institutional COVID-19 outbreaks in Ontario.
The shaded area notes that this account's current data is being used to fill the gap from the data provided by Public Health Ontario. You can expect the current outbreak numbers to be revised up as not all PHUs report outbreaks, some outbreaks originally classified as "unspecified" are determined to be COVID-19, or outbreaks are reported late.