John Cornelius Butler (July 2, 1887 – August 13, 1953) was a Republican politician from New York.

[2] Butler worked in businesses on Buffalo's Lake Erie waterfront, primarily as an electrician.

[2] He later became active in several unions, including the longshoremen's, grain elevator employees', and electrical workers'.

[2] After losing his seat, Butler was employed as sales manager for the Fire Equipment Sales Company and estimator for the Beacon Electrical Engineering and Construction Company, both of Buffalo.

[3] As a member of Congress, Butler was best known for his opposition to the Saint Lawrence Seaway, which he believed would have a detrimental effect on Buffalo's shipping and cargo handling industries.