Mrs. Ann R. (Mackin) LeBlanc, of Watertown, died Saturday, May 20, 2006 at MetroWest Medical Center in Natick. She was 88 Born in Newton, a daughter of the late William and Mary (Campbell)Mackin, she had been a lifelong resident of Watertown. Until her retirement, she worked as an assembler for forty years at the Raytheon Corporation. Ann was a graduate of Watertown High School. She was the wife of the late Chester F. LeBlanc and sister of the late John, James, and William Mackin. She leaves her son John C. 'Jack' LeBlanc and his wife, Pamela of Watertown; one grandaughter, Robyn LeBlanc of Watertown and many nieces and nephews. Private funeral services will be held at the convenience of the family.