Sir Steuart Colvin Bayley, GCSI, CIE (26 November 1836 – 3 June 1925) was a British civil servant and Lieutenant-Governor of Bengal from 1887 to 1890.

He was the son of William Butterworth Bayley, who rose to be acting Governor-General of India, and Anne Augusta Jackson.

His middle name is a reference to the well-connected Colvin family of Anglo-Indian administrators, just as John Russell Colvin named his son after his boss, George Eden, 1st Earl of Auckland.

He was invested Knight Commander of the Order of the Star of India (KCSI) in 1878.

In 1888, he accompanied the Sikkim expedition and was awarded the India General Service Medal (1854–95) with clasp for 'Sikkim 1888'.