1956 United States Senate election in Maryland

The 1956 United States Senate election in Maryland was held on November 6, 1956. Incumbent Republican U.S. Senator John Marshall Butler was re-elected to a second term in office, defeating Democratic businessman George P. Mahoney.

, this was the last time Maryland voted simultaneously for a Republican presidential candidate and a Republican senate candidate. This was the first time ever that Maryland re-elected a Republican Senator.

Candidates

 * John Marshall Butler, incumbent Senator since 1951
 * Earl E. Knepper
 * Henry J. Laque, Jr.

Candidates

 * George P. Mahoney, Baltimore businessman and 1952 nominee for Senate
 * Millard Tydings, former Senator from 1927 to 1951

Results
After winning the primary, Tydings was forced to withdraw from the race due to ill health. Mahoney replaced him on the general election ticket.

Counties that flipped from Democrat to Republican

 * Caroline
 * Cecil
 * Dorchester
 * Harford
 * Howard
 * Kent
 * Talbot
 * Worcester

Counties that flipped from Republican to Democrat

 * Baltimore (City)
 * Garrett
 * Prince George's