The Palo Pinto County Sheriff's Office said 11-year-old Sarah Beth Hull and 13-year-old Natalie Renea Hull were found, but no other details about their disappearance were released.
KTVT-TV reports the girls may have run away after communicating with someone on the internet.
Both girls had been last seen Thursday at around 4 a.m. in Santo, Texas. The city is about 90 miles outside of Dallas.
Amber Alerts are issued when authorities have reason to believe a child is in grave or immediate danger.