| William Cary Sanger | |
| Birth Date: | 21 May 1853 |
| Birth Place: | Brooklyn, New York |
| Death Place: | Brooklyn, New York |
| Resting Place: | Green-Wood Cemetery |
| Occupation: | Lawyer, politician |
| Spouse: | Mary Ethel Cleveland Dodge |
| Signature: | Signature of William Cary Sanger, Sr.png |
| Office1: | United States Assistant Secretary of War |
| Term Start1: | 1901 |
| Term End1: | 1903 |
| Office2: | Member of the New York State Assembly |
| Term Start2: | 1895 |
| Term End2: | 1897 |
William Cary Sanger Sr. (May 21, 1853 – December 6, 1921) was an American politician who served as the United States Assistant Secretary of War from 1901 to 1903.
He was born on May 21, 1853, in Brooklyn, New York City, to Henry Sanger (1823-1888) and Mary E. Requa (1835-1910). He attended Brooklyn Polytechnic and then Harvard College, where he graduated with an A.B. in 1874. He received an LL.B. from Columbia University in 1878. He was a member of the New York State Assembly from 1895 to 1897. He married Mary Ethel Cleveland Dodge (1869-1952).
He was the United States Assistant Secretary of War from 1901 to 1903.
He received an LL.D. from Hamilton College in 1902. He was president of the American delegation to the Geneva Conventions of 1906.
From 1911 to 1913 he served on the New York State Hospital Commission.[1]
He died on December 6, 1921, in Brooklyn.[2] He was buried in Green-Wood Cemetery. His widow died in 1952.[3]