Retired Army Col. Dermot P. Dalton, 60, a veteran of World War II, Korea and Vietnam, died of a heart ailment Monday at George Washington University Hospital.

He commanded a field artillery battery in Europe during World War II and later was assistant secretary of the general staff headquarters of the 7th Army there.

Col. Dalton was a combat officer in Korea during the conflict there in the early 1950s. He was a staff officer in Vietnam, where he served in the 1960s and again in the early 1970s.

During the 1960s, he also had been a personnel officer in Washington and an operations and plans officer for the Army's Pacific Command in Hawaii.

From 1972 until retiring from active duty in July 1974, he was alternate president, and vice chairman of the Army's Physical Disability Agency at Walter Reed Army Medical Center.

Col. Dalton was born in Dublin, Ireland, and was reared in Massachusetts. He was a graduate of Holy Cross College and Boston University's law school. He enlisted in the Army in 1942 and received his commission later that year.

His decorations included the Legion of Merit with one oak leaf cluster and the Bronze Star with two oak leaf clusters.

Col. Dalton had lived in Washington since 1963.

Survivors include his wife, Janet, three daughters, Katherine J. Bridget M., and Elizabeth, and three sons, William, Patrick, and James, all of Pocasset, Mass., and a brother Brendan, and two sisters, Deirdre Patrick and Sister Nuala Dalton, all of Boston.

The family suggests that expressions of sympathy be in the form of contributions to the Army Emergency Relief, 200 Stovall St., Alexandria, 22332.