The 1955 French Championships (now known as the French Open) was a tennis tournament that took place on the outdoor clay courts at the Stade Roland-Garros in Paris, France. The tournament ran from 24 May until 4 June. It was the 59th staging of the French Championships, and the second Grand Slam tennis event of 1955. Tony Trabert and Angela Mortimer won the singles titles.
See main article: 1955 French Championships – Men's singles. 
Tony Trabert defeated 
Sven Davidson 2–6, 6–1, 6–4, 6–2
See main article: 1955 French Championships – Women's singles. 
Angela Mortimer defeated Dorothy Knode 2–6, 7–5, 10–8
Vic Seixas / Tony Trabert defeated 
Nicola Pietrangeli / Orlando Sirola 6–1, 4–6, 6–2, 6–4
See main article: 1955 French Championships – Women's doubles. Beverly Baker Fleitz / Darlene Hard defeated Shirley Bloomer / Patricia Ward 7–5, 6–8, 13–11
Darlene Hard / Gordon Forbes defeated 
Jenny Staley / Luis Ayala 5–7, 6–1, 6–2