Born in New Bedford, MA, the daughter of the late A. Manuel Mendonca and A. Ludovina (Raposa) Mendonca. She resided on Nash Road with her family and attended New Bedford Public school.
Upon her marriage to the late Thomas P. Richards, she moved to Dartmouth, MA, where she spent most her life.
Helen was known for her flair for fashion and worked several years in retail, both apparel and jewelry.
She is survived by her son, T. Kevin Richards, and his wife Joan of East Freetown, her grandson T. Keith Richards and his wife Laura Rau of North Stonington, Ct. and two great grandchildren Bryce and Ruby Richards.
She was the sister of the late Mary Patricia Howe, Francisco Mendonca and Valentine Mendonca.
She was the grandmother of the late Brian P. Richards of Lakeville.
Her funeral and burial will be private. Arrangements are in the care of the WARING-SULLIVAN HOME at DARTMOUTH, 230 Russells Mills Road, Dartmouth, MA 02748.