Joseph A. Price, 69, executive secretary of the Montgomery County Commission on Aging, died of cardiac arrest Wednesday at Holy Cross Hospital in Silver Spring.

He was named the commission's first full-time chairman in 1970. The commission, a citizens advisory group, channels its recommendations to the country through the commission's executive secretary, who is a county employe.

Mr. Price joined the Montgomery County government in October 1960. After six years with the Department of Social Services, he joined the old county housing authority, where he helped find housing for elderly persons who had been displaced by public actions.

He was a member of St. Bernadette's Catholic Church in Silver Spring and belonged to the Rosensteel Council of the Knights of Columbus.

Before coming to the Washington area in 1960, Mr. Price had worked as a salesman for the Pfizer Drug Co. in his native Carbondale, Pa.

He is survived by his wife, Pauline, and two sons, Joseph R. and Michael J., all of the home in Silver Spring; another son, James C., of Wheaton; a daughter, Karen Doherty, of Mohegan Lake, N.Y.; two sisters, Mary Price and Grace Clark, and two brothers, Gerald and Walter, all of Carbondale, and four grandchildren.