Arnold Babb Gridley, 1st Baron Gridley, KBE (16 July 1878 – 27 July 1965) was a British Conservative politician.

Gridley was the son of Edward Gridley of Abbey Dore in Herefordshire. He worked as a consulting engineer but later turned to politics. In 1935 he was elected to the House of Commons for Stockport, a seat he held until the constituency was abolished in 1950, and then represented Stockport South from 1950 to 1955. The latter year he was raised to the peerage as Baron Gridley, of Stockport in the County Palatine of Chester.

Lord Gridley married Mabel, daughter of Oliver Hudson, in 1905. He died in July 1965, aged 87, and was succeeded in the barony by his eldest son Arnold.

Coat of arms of Arnold Gridley, 1st Baron Gridley

Crest A wyvern Azure semee of lozenges Or, resting the dexter claw on a grid iron Gules. Escutcheon Gules three bendlets enhanced and in base a portcullis chained Or. Supporters On the dexter a wyvern Azure semee of lozenges Or on the sinister a lion Gules semee of grid irons Gold. Motto Devant Si Je Puis[1]

• Kidd, Charles, Williamson, David (editors). Debrett's Peerage and Baronetage (1990 edition). New York: St Martin's Press, 1990.
• Leigh Rayment's Peerage Pages ^{[self-published source] [better source needed]}

• Hansard 1803–2005: contributions in Parliament by Arnold Gridley