Ypres Reservoir Cemetery, Commonwealth war cemetery in Ypres, Belgium.

Ypres Reservoir Cemetery is a World War I burial ground holding approximately 2,700 graves arranged in orderly rows across carefully tended grounds. White limestone headstones mark each grave and dominate the appearance of the entire site.

The cemetery was established in October 1915 as a burial site for soldiers who died during combat in the Ypres Salient. It stands as a record of losses from one of World War I's bloodiest battlefields.

The memorial wall's Dutch inscription records that the Belgian population gave this ground as a perpetual resting place for soldiers of the Allied armies. The cemetery holds 2,614 dead, including 2,273 Britons, 143 Australians, 155 Canadians, 28 New Zealanders, 12 South Africans, 2 Indians and one unknown German. Two brothers, Major James L. Knott and Captain Henry B. Knott, lie side by side.

The cemetery lies inside Ypres' city walls, about 660 m north-west of the Grote Markt, and is reached through two entrance gates flanking the Cross of Sacrifice. The trapezium-shaped site covers roughly 11,900 m², with the Stone of Remembrance at its centre. The CWGC holds records of the 2,614 dead, including the 1,035 unidentified.

The cemetery also holds the graves of two brothers, Major James L. Knott of the West Yorkshire Regiment and Captain Henry B. Knott of the Northumberland Fusiliers, killed on 1 July 1916 and 7 September 1915 and buried side by side. Among the youngest is Private P. Finn of the King's Own Yorkshire Light Infantry, who died on 20 September 1915 aged 16.