Betty Montgomery (born April 3, 1948) is an American politician from the state of Ohio. A Republican, she formerly served as Ohio State Auditor.

Montgomery was elected Wood County Prosecutor in 1980. In 1988, she was elected to the Ohio Senate where she chaired the Criminal Justice Subcommittee and the Senate Judiciary Committee. Montgomery worked on passing Ohio's first living-will law.

In 1994 Montgomery was urged by Republican Party leaders to challenge Democrat Lee Fisher for the job of Ohio Attorney General. Montgomery was the first Republican attorney general in 24 years to hold the office. She faced an uphill battle against the very-popular Fisher. Montgomery campaigned on her record as a prosecutor. She narrowly defeated Fisher by a vote of 1,716,451 to 1,625,471. As Attorney General, Montgomery worked to increase funding for law enforcement and for more crime labs. She defeated Democrat Richard Cordray for re-election in 1998, earning more votes than any other Republican candidate.