"May-December romances....The last Confederate widow, Maudie Hopkins died on Aug. 1, 2008, at age 93. The last Union widow, Gertrude Janeway, died Jan. 17, 2003, also at age 93. The last Civil War veterans themselves, both Union and Confederate, died in the 1950s. Both men were more than 100 years old."
Stated in this 2016 article:
US News & World Report - North Carolina woman is daughter of a Civil War veteran, and still collects his benefits
"'One beneficiary from the Civil War [is] still alive and receiving benefits," Randy Noller of the Department of Veterans Affairs confirms. Irene Triplett – the 86-year-old daughter of a Civil War veteran – collects $73.13 each month from her father's military pension."
"Triplett's father was Mose Triplett, born in 1846. He joined the Confederate army in 1862, but later deserted and signed up with the Union. His first wife died and they did not have any children. He later married Elida Hall who was at least 50 years younger....Mose Triplett was 83 when Irene was born"
I don't what I read now. Maybe it was a widow alive at the time of the war.