The Billings Estate National Historic Site is a heritage museum in Ottawa, Ontario, Canada.

Billings became prosperous in the timber trade and built the large home that was named Park Hill.

Over time the property was slowly sold off to developers, and today the estate retains only a relatively small plot of land.

The house is included amongst other architecturally interesting and historically significant buildings in Doors Open Ottawa, held each year in early June.

Very few of the artifacts owned by the Billings Estate National Historic Site are on display at any given time.