Last Saturday at 11.40pm, the woman was walking through an alley off Kingsway.
It is believed that a man approached her and following a brief struggle, stole her handbag.
The man allegedly then pushed her to the floor before running off with the bag containing almost £400 in cash.
A police spokesman said: “The suspect is described as slim build, 5ft 3ins tall. The elderly woman was left dazed and with minor injuries as a result of the incident, which has understandably caused her a great deal of distress.
“Anyone with any knowledge of the incident is being urged to call 101 quoting incident number 1094 of September 21. Alternatively information can be given anonymously by calling Crimestoppers on 0800 555 111.”