Isaac Samuel Johnson (October 28, 1840 – September 25, 1906) was an American lawyer and politician from New York.
[3] In August 1862, during the American Civil War, Johnson was enrolled in the 136th New York Infantry Regiment.
In September 1862, he was mustered in as first sergeant of Company D. In March 1863, he was promoted to first lieutenant.
After Bartlett moved to Minnesota in 1881, Johnson formed a law partnership with H. E. Dean.
[5] In 1876, Johnson was elected District Attorney of Wyoming County, an office he was re-elected twice to and served in for nine years.
In 1889, he was elected to the New York State Assembly as a Republican, representing Wyoming County.