The Washington County Sheriff's Office said it found Karen Rojas, who is now 11. She was enrolled in school under an alias, according to investigators.
Authorities said she was kidnapped on June 2, 2020.
At the time, authorities said the Los Angeles County Department of Children and Family Services had been conducting an investigation involving the child.
"According to authorities, the child's mother - who had custody - stopped communicating with DCFS personnel and was believed to have taken the child," L.A. County sheriff's officials said in a statement.
On Friday, the Los Angeles County Sheriff's Department notified Washington County law enforcement that the girl may be in North Carolina.
The Washington County Sheriff's Office conducted an investigation and found the child enrolled at a local school, authorities said.
The girl was found safe Tuesday and is now in protective custody.
"These are very rare occurrences to have such a positive outcome on such an old case as this, but it reminds us that through hard work, and dedication, and cooperation, stories with positive outcomes like these can happen," the Washington County Sheriff's Office said in a social media post.
An investigation is ongoing, and the L.A. County Sheriff's Department says it continues to work with DCFS and authorities in North Carolina.
Due to the age of the child, further information was not immediately available.