Sir Collingwood Schreiber, KCMG (4 Dec 1831 - 23 Mar 1918) was a surveyor, engineer, and civil servant. He is best known for his contribution to the construction of the Canadian Pacific Railway (CPR).

Schreiber was born in Bradwell-on-Sea, Essex, England, United Kingdom to the Reverend Thomas Schreiber and Sarah Bingham. Schreiber trained in England, and then migrated to Canada in 1852, along with the rest of his family. He shortly thereafter began work as a railway engineer with the Hamilton & Toronto Railway. After four years with the firm, Schreiber left to work with Sandford Fleming. After working on various private railways, in 1864 Schreiber received his first government appointment, and by 1873 he was the chief engineer for all government railways.

Subsequently, Schreiber became intimately involved in the construction of the CPR. In June 1880 the "pliant" Schreiber was appointed by Sir Charles Tupper to replace the ousted Fleming as the chief engineer for the project, and by July of that same year had become general manager of all government railways in operation. He arranged financing and conducted repeated inspection tours, often with general manager William Cornelius Van Horne. Without his efforts, it is certainly possible that the CPR would never have been completed.

In 1893, he was made a Companion of the Order of St Michael and St George and, in 1916, a Knight Commander.

Schreiber died in Ottawa. The township of Schreiber, Ontario, is named after him and contains a plaque commemorating his life and achievements - Wikipedia.