Navy Hall is a wooden structure encased within a stone structure that was the site of Upper Canada's (Ontario's) first provincial parliament, from 1792 to 1796. It is a unit of Fort George National Historic Site located in Niagara-on-the-Lake, Ontario, then known as Newark, Upper Canada. It sits on Ricardo Street near the shore of the Niagara River, near Fort George, and across the river from Fort Niagara.
The original Navy Hall was built as naval establishment in 1765 by Royal Naval Commanders. It consisted of a small shipyard, docks, stores and residences, and was a local supply depot, as well as a trans-shipment point for posts on the upper Great Lakes. During the American Revolution, the Provincial Marine wintered at this complex. In 1792, John Graves Simcoe, the first Lieutenant-Governor of Upper Canada, converted one of the buildings into his residence and office.
In 1792, the first parliament in Upper Canada met in a tent near this site. The first session to sit in Navy Hall was on September 17, 1792. The next year, Simcoe decided to move the capital to York, Upper Canada (now Toronto), a site less vulnerable to attack from the United States. While the first purpose-built Parliament Buildings were being constructed there, Newark continued to serve as the seat of government until 1796. After Parliament left, the building was used as a dining hall by officers from nearby Fort George. Destroyed by U.S. artillery fire in the War of 1812, some of the fort's buildings were re-built by the British, and today's Navy Hall is the only one remaining of that reconstruction.


Originally a wooden storehouse, it was built shortly after the War of 1812, and became a barracks for British troops in 1838, during the Rebellion of 1837–38. It served as a medical commissary during World War I for Canadian troops at what became Camp Niagara, a site preparing soldiers for overseas service. During the 1930s, it was moved to its present site by the Niagara Parks Commission and encased in stone.
現在の建物は、カナダ国立公園局がフォート・ジョージの一部として管理しており、フォート・ジョージは「ナイアガラ国立史跡」という行政区分に属する、この地域にある複数の国立史跡の一つです。ネイビー・ホールは私的な催し物に貸し出されていますが、人員不足のため一般には公開されていません。館内には200年以上の歴史を物語る遺物が収蔵されています。フォート・ジョージの向かいに位置し、屋外の解説展示を読んだり、シムコー記念碑を見学したり、公園の静かな景色からナイアガラ川とニューヨーク州のフォート・ナイアガラを眺めたりすることができます。敷地内には駐車場があり、観光客や近くの桟橋から出発する蒸気船ツアーに参加する人にとって便利です。