The 1955 Baltimore Orioles season was the second season played in Baltimore. It involved the Orioles finishing 7th in the American League with a record of 57 wins and 97 losses, 39 games behind the AL champion New York Yankees. The team was managed by first-year manager Paul Richards and played their home games at Baltimore's Memorial Stadium.

In the fall of 1954, the Orioles further distanced themselves from their Browns past by making a 17-player trade with the New York Yankees that included most former Browns of note still on the Baltimore roster. Indeed, to this day the Orioles make almost no mention of their past as the Browns.^{[citation needed]} Though the deal did little to improve the short-term competitiveness of the club, it helped establish a fresh identity for the Oriole franchise.

The details of the trade were as follows: Don Larsen, Billy Hunter, Bob Turley, and players to be named later were traded by the Orioles to the New York Yankees for Gene Woodling, Harry Byrd, Jim McDonald, Hal Smith, Gus Triandos, Willy Miranda and players to be named later. The deal was completed on December 1, when the Yankees sent Bill Miller, Kal Segrist, Don Leppert, and Ted Del Guercio (minors) to the Orioles, and the Orioles sent Mike Blyzka, Darrell Johnson, Jim Fridley, and Dick Kryhoski to the Yankees.^[1]

Unlike other clubs that transferred in the 1950s, retaining their nickname and a sense of continuity with their past (such as the Brooklyn-Los Angeles Dodgers and New York-San Francisco Giants), the St. Louis Browns were renamed upon their transfer, implicitly distancing themselves at least somewhat from their history.

All-Star Game

• Jim Wilson, reserve^[7]

Pine Bluff franchise transferred to Meridian and renamed, June 16, 1955