The Charles Cossitt House is a historic residence located in Brockville, Ontario, Canada. Built in the mid-19th century, it showcases a blend of architectural styles, primarily Gothic Revival and Italianate. The house is notable for its intricate woodwork and distinctive design elements, reflecting the prosperity of the era. Today, the Charles Cossitt House serves as a museum, offering visitors a glimpse into the life of its original owner, Charles Cossitt, a prominent local businessman. The site is recognized for its cultural significance and is part of the Brockville Heritage Walking Tour, attracting history enthusiasts and tourists alike.