Indiana State Police said Emery Osborne was located "safe and sound" and reunited with her family.
Osborne went missing Monday at 7 a.m. State police said she was last seen walking her dog. The dog returned home, but she didn't.
Police thought she could be in extreme danger and might have required medical assistance.
The alert was canceled just before 1:15 p.m., when police said Osborne had been found safe.
Columbia City is 120 miles northeast of Indianapolis in Whitley County.
Amber Alert vs. Silver Alert: What's the difference?
There are specific standards a person's disappearance must meet in order for police to declare an Amber Alert or a Silver Alert.
Amber Alerts are for children under the age of 18 who are believed to have been abducted and in danger. Police also need to have information about a suspect and their car to issue an Amber Alert.
Silver Alerts are for missing and endangered adults or children. They are much more common for missing people. It was not until recently that the standards for Silver Alerts were expanded to include children.
In both situations, these alerts must be issued by police.