Ann M. Costigan, 85, of Oceanside, NY. passed away on June 9, 2022. Born on January 4, 1937 to the late John and Anna Boyle Hamilton. She was the beloved wife of 66 years to William (Bill) Costigan She was the devoted mother of Kevin and Kathy Costigan of Oceanside, NY; Michael and Margaret Costigan of Huntersville, NC; John and Celia Costigan of New York City, NY; William Jr. and Joyce Costigan of Long Beach, NY; Thomas and Marie Costigan of Huntersville, NC ; Kerry-Ann and William (Billy) Brown of Baldwin, NY. Loving grandmother of Rev. Christopher Costigan, Pastor of St. Martin of Tours RC Church Bethpage, NY, Sean Costigan,Timothy Costigan and wife Kim, Ryan and wife Caitlin Costigan, Thomas John (TJ) Costigan, Brittaney Costigan and husband Tom Beil, Kaitlyn Costigan, Jaclyn Costigan, Alanna Costigan and fiancé Enmanuel Lopez, Catherine Costigan and fiancé Robert Blount, John Costigan, Laura Costigan, Kyle Brown, Connor Brown, Falon Costigan and Brenna Costigan. Adored great grandmother of Kane, Reese, Niamh, Ronan and Faye Costigan She is also survived by her furry friend Kiko. Ann worked many years for Nassau County Police Administration as a School Crossing Guard in Oceanside. She was an avid Bingo Player at St. Anthony’s Church and Daniel J. Bradley K of C Council #3102 Baldwin and a prolific writer on Facebook. She was so proud of her husband, children and grandchildren’sservice to the community and church. A Mass of Christian burial will be held at 9:45am on Monday, June 13th at St Christopher's RC Church, 11 Gale Ave., Baldwin. Burial will be in Holy Rood Cemetery, Westbury on Monday, June 13th at 11:15 am. Calling hours will be Saturday, June 11th from 7-9pm and Sunday, June 12th from 2-4 & 7-9pm at Towers Funeral Home Inc., 2681 Long Beach Rd, Oceanside, NY.