Sir Thomas Abney (January 1640 – 6 February 1722) was an English merchant and banker who served as Lord Mayor of London from 1700 to 1701.

Abney was apprenticed to William Thorogood, citizen and fishmonger of London, on 1 February 1658.

[2] Abney was a pious man, and no business or festivity, was allowed to interrupt his religious observances.

It was said that "on the day he became Lord Mayor, he withdrew from the Guildhall after supper, read prayers at home, and then returned to his guests".

For thirty-six years he kept Dr Isaac Watts, as his guest and friend, at his mansion at Stoke Newington.