Clitus O. Bourdeaux, 75, a retired attorney who practiced in Rockville for 30 years, died Wednesday at Montgomery General Hospital in Olney. He had cancer.

Mr. Bourdeaux was born in Lauderdale, Miss., and grew up there. and in Washington. He graduated from old Central High School and earned bachelor's and master's degrees in law at the National University Law School, now part of George Washington University, in 1930 and 1931.

While attending law school, Mr. Bourdeaux worked for the Union Trust Co. in Washington. In 1935, he joined the First National Bank in Gaithersburg. From 1942 to 1945, he operated a chicken hatchery on his property in Gaithersburg. He established a private practice in general law in Rockville in 1945 and continued it until his retirement in the mid-1970s.

Mr. Bourdeaux was active in Democratic Party politics in Montgomery County and was a candidate for the Maryland House of Delegates in 1946. In 1959, he was one of three attorneys recommended by the Montgomery County Bar Association for a circuit court judgeship.

Mr. Bourdeaux's survivors include his wife, Margery G., of Gaithersburg; two sons, Thomas D., of Gaithersburg and Robert B., of Damascus; a daughter, Margaret B. Macensky of Alexandria; three sisters, Eugenia B. McCausland of Kensington, Mary B. Lenhart of Adelphi, and Geneve B. Hoyle of Gaithersburg, and eight grandchildren.