At which high school did Andy and Barney graduate in 1948?

Andy and Barney graduated from Mayberry Union High School in 1948.

The detail comes from the characters’ shared history in Mayberry. Barney Fife and Andy Taylor are described as having grown up together and graduating in the same class, reinforcing their long friendship before the series begins. Mayberry itself is fictional, so the school is part of the show’s invented North Carolina setting.

The year creates one of the show’s continuity quirks. Barney sometimes claims military service, while other dialogue places his service after high school and describes him as a stateside file clerk. The series was not always consistent about the characters’ biographies, but the school and graduation year are specifically identified together.

This answer is easy to confuse with Mount Pilot, the nearby larger town frequently mentioned in the series, or with Raleigh, where Andy and Barney occasionally travel. Neither is their high school.