John Waldemar Wydler (June 9, 1924 – August 4, 1987) was a Republican member of the United States House of Representatives from New York.

He served in the United States attorney's office for the Eastern District of New York from 1953 until 1959.

[2] On December 24, 1987, the U.S. Post Office at Garden City, New York was named in his honor.

In addition, the John W. Wydler Government Documents Depository, Axinn Library, at Hofstra University, was also dedicated to him.

Wydler is buried in the Cemetery of the Holy Rood in Westbury, New York.