St Martin Outwich was a parish church in the City of London, on the corner of Threadneedle Street and Bishopsgate.

[1] The patronage was in the hands of the earls of Surrey and then of the Outeswich family, until it was transferred to the Merchant Taylors' Company.

There was a fresco of the Ascension by John Francis Rigaud over the altar, which had deteriorated badly within ten years of being painted.

The pulpit was moved to the west end as part of a programme of repairs and alterations by Charles Barry in 1827.

[1] The heavily rusticated east front (illustrated above), facing into Bishopsgate, was described by James Peller Malcolm as "a complete representation of a gaol, accompanied by marks of extreme strength, very ill suited to its diminutive outline."