| Intro | American politician |
| Was | Politician |
| From | United States of America |
| Type | Politics |
| Gender | male |
| Birth | 9 October 1871 |
| Death |
5 September 1943, Miami, Miami-Dade County, Florida, U.S.A. (aged 71 years) |
| Politics | Republican Party |
James Herbert Sinclair (October 9, 1871 – September 5, 1943) was a U.S. Republican politician.
He was born near St. Marys, Ontario, Canada and moved to North Dakota in 1883. He was elected to North Dakota’s State House of Representatives between 1915 and 1919 and then as a Republican member of North Dakota’s congressional delegation for 8 consecutive terms between 1919 and 1935.