Mr. Allen is a character in Northanger Abbey. He was a wealthy man, and owned most of the area where the Morlands lived in Wiltshire. He was ordered to go to Bath due to his gouty constitution, as the sea air would aid with that ailment. Mrs. Allen accompanied him, and they brought Catherine Morland, the young friend of Mrs Allen.
He is described as very sensible and intelligent, with a love of history.