Williston C. Hobbs, 53, a mathematics professor at Prince George's Community College, died Sunday at Prince George's General Hospital after a heart attack.

Mr. Hobbs joined the Prince George's faculty in 1965. Since then he also had served as chairman of the mathematics department and as dean.

Before that he taught at Hampton Institute in Hampton, Va., and Morris Brown College in Atlanta. He taught at Howard University from 1957 until joining Prince George's Community College.

He was the author of a mathematics textbook and coauthor of another.

Mr. Hobbs was a native of Washington. A graduate of Dunbar High School he earned bachelor's and master's degrees at Howard University.

He helped organize the Brentwood Community Chorus in 1940 and led the group in area churches.

He was a member of the First Baptist Church in North Brentwood and had conducted its choir.

His professional memberships included the American Association of University Professors, the National Council of Teachers of Math and the D.C. Council of Math Teachers.

He is survived by three brothers, Dr. Addison S., of Baltimore, Dr. Orlando S., of Washington, and John D., of San Bernardino, Calif., and a sister, Alvergia E. Guyton, of Ankara, Turkey.