| William R. Moultray | |
| Office: | Member of the Washington State Senate |
| Term: | 1901 - 1903 (33rd district) 1903 - 1905 (41st district) |
| Office2: | Member of the Washington House of Representatives |
| Term2: | 1889 - 1891 |
| Birth Date: | 10 September 1852 |
| Birth Place: | Missouri, United States |
| Death Place: | Bellingham, Washington, United States |
| Party: | Republican |
William Riley Moultray (September 10, 1852 – November 20, 1930) was an American politician in the state of Washington. He served in the Washington State Senate from 1901 to 1905.[1] [2]