Nancy Fullingim
Nancy with her husband, William, in their later years.
Birth: 1 November 1860
Decatur, Texas, USA
Death: 25 April 1964
Lawton, Oklahoma, USA
Age: 103 years, 176 days
Country: USA FlagUSA

Nancy Fullingim (neé Watson) (1 November 1860 – 25 April 1964) was an American centenarian. She was born as Nancy Watson in Decatur, Wise County, Texas. Her parents were Andrew and Martha Watson.

On 11 August 1879, she married William Fullingim. The couple had three children in total. One of them, Madge (1891 - 1989), lived to be 97 years old. The family later moved to Oklahoma.

She was married to her husband from 11 August 1879 until her death on 25 April 1964, which would mean a marriage that lasted 84 years, 258 days. They were the world's longest known married couple.

Fullingim died on 25 April 1964 in Lawton, Comanche County, Oklahoma, at the age of 103 years, 176 days. William died the year after at the age of 110.