What is the life expectancy of a Domestic Mediumhair cat?

The life expectancy of a Domestic Mediumhair cat is typically around 12 to 16 years, though some can live well into their late teens or even early 20s with proper care. Their mixed ancestry often gives them a more robust genetic makeup, which can contribute to fewer breed-specific health issues and a potentially longer lifespan. 

Regular vet check-ups, a healthy diet, a safe living environment, and plenty of love can help them live a long and happy life.