Sir Allan Cotton or Allen (c. 1568 ― December, 1628) was an English merchant who was Lord Mayor of London in 1625.

[1] Allan came from a Shropshire branch of the Chesire minor noble family Coton which had existed since the 13th century at least.

Cotton was a city of London merchant and a member of the Worshipful Company of Drapers.

On 9 July 1616 he was elected an alderman of the City of London for Dowgate ward.

In 1625 he became alderman for Candlewick ward and was elected Lord Mayor of London.