She's scheduled to take the oath of allegiance today, in Brownsville, Texas, during a special naturalization ceremony.
A U.S. magistrate will administer the oath in federal court.
U.S. immigration officials say Garcia-Maturey was born in Mexico on Feb. 12, 1909.
She arrived in the U.S. with her parents on Oct. 12, 1909, in Brownsville.
She lived there ever since, raising two children.
Garcia-Maturey tells the AP she's happy because she'll be able to vote Nov. 2.