Agnes Nixon (born Agnes Eckhardt on December 27 1927) is an American writer and producer.

She attended Northwestern University where she was a member of Alpha Chi Omega sorority.

She is best known as the creator of soap operas such as One Life to Live and All My Children. Having a key role in the production of these programs, she was either executive producer or consulting producer for both shows for many years: on One Life to Live from 1968 to 1975, and All My Children from 1970 to 1981. She continued to write the program with Wisner Washam until 1983, and again with him from 1988 to 1992, continuing on as a consultant in recurring capacities until 2000. From 1970 until 1992, every episode of All My Children was written by either Agnes Nixon or her protégé Wisner Washam (her role with One Life to Live was more limited once she surrendered the day-to-day aspects of the show in 1975).