Carmel DeMarco Aman, 67, who retired in 1970 after 25 years as coeditor and publisher of the Prince George's Post, a weekly newspaper based in Hyattsville, died of kidney failure Tuesday at Prince George's General Hospital. She lived in University Park.

Mrs. Aman worked as a writer on the editorial staff of the National Geographic Society for several years before her marriage in 1943 to George A. Aman. She then joined her husband as coeditor and publisher of the Prince George's Post. After his death in 1970, she sold the newspaper and retired.

A native Washingtonian, Mrs. Aman attended local schools and graduated from Eastern High School. Her mother was a D.C. public school teacher and her father was a musician with the U.S. Marine Band who had played under John Philip Sousa.

Mrs. Aman earned a bachelor's degree from the University of Maryland. She was active in campus theatricals and publications and was a member of the university's Authorship and Poety clubs. She also served as president of the Spanish Club at the university.

She was a former member of the Board of Directors of the Prince George's County Salvation Army, and was active in the Prince George's County Women's Committee of the National Symphony.

Survivors include a brother, retired Col. James A. DeMarco of Sun City, Ariz.