Erasto Alvarado Núñez was born in Cuaracurio, Michoacán, Mexico, on 25 July 1912, to parents Margarito Alvarado and Matilde Núñez. At some point, he married Celestina Rodriguez.

In 1978, he emigrated to the United States. His wife passed away on 1 January 2017, aged 100.

Erasto Alvarado Núñez passed away in Cartersville, Georgia, USA, on 2 February 2023, at the age of 110 years, 192 days.