Sarnia residents filled up on Big Mac's, chicken nuggets and fries on McHappy Day.
The community raised $21,758.98 for Access Open Minds, a youth mental health and addictions hub expected to open in the fall.
Over $8,250 was raised for Ronald McDonald House London.
Ronald McDonald House Charities Southwestern Ontario (RMHC) supports families traveling to Windsor or London for treatment.
More than 1,400 restaurants across the country participated in McHappy Day last Wednesday.