St Philip's Marsh is an industrial inner suburb of Bristol, England. It is bounded by River Avon and Harbour feeder canal making it an almost island area, unlike the other two areas surrounded by water, it was historically part of Gloucestershire and is part of North Bristol. The site is home of Avonmeads Retail Park, a large retail and leisure park with Showcase Cinemas and a Hollywood Bowl ten-pin bowling centre among its tenants. It was extensively redeveloped in the 15 years to 2007.

A bypass runs over the River Avon creating a major transport link from the A4 road in south east Bristol, to junction 3 of the M32 motorway near the city centre. In past years St Philip's marsh was a housing development for the workers of Bristol's market area (now known as Old Market). One of St Philip's' more influential residents during the early 1900s was George Townsend, a major property developer of the South Bristol area. His family home situated in the St Anne's area of Bristol is still standing today and a reminder of Bristol's history. Today there is very little housing in the area making it almost deserted at night, and other than the retail area it does contain one shop, pub, takeaway and Sparke Evans Park. St Davids Welsh Anglican Church was sited on Feeder road until demolition in 1922. Other churches in the area include St Silas (also Feeder Road) which was damaged during the Bristol Blitz.

The solid geology of St Philip's Marsh comprises Triassic Redcliffe Sandstone in the east, and Triassic mudstone and halite-stone of the Mercia Mudstone Group to the west. The solid geology is overlain by Quaternary Tidal Flat Deposits of silt and clay, which are in turn covered by deep deposits of made ground.

Sparke Evans Park is situated on the riverside not far from the retail park. The land was donated by P.F. Sparke Evans and Jonathan Evans, local tannery owners, in 1902. It is a survivor from a time when the Marsh was a residential area. Since the area has become almost totally industrial it now gets little use, what use it does get is by workers on breaks and from the residents of Arno's Vale and Totterdown as there is a bridge linking the two areas. A shelter dating from 1925 is still extant on the far west of the park featuring wrought-iron pillars, with ornate and decorative brackets.

v t e Railways in the Bristol area
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Cross Country Route Thornbury branch line Yate South Wales Main Line New Passage Pier Westerleigh Junction New Passage Halt Cross Hands Halt South Wales Main Line via Severn Tunnel Pilning Severn Beach Coalpit Heath Severn View Industrial Park Winterbourne Chittening Industrial Estate Bristol Parkway Patchway Smoke Lane Industrial Estate Ram Hill Colliery Chittening Platform Hallen Halt Avonmouth Docks Henbury St Andrews Road Charlton Halt Avonmouth (BPR&P) North Filton Platform Avonmouth (Royal Edward) Stoke Gifford depot Avonmouth Docks Westerleigh Goods Depot Avonmouth Avonmouth Light Railway Filton Junction Avonmouth Docks Filton Portway Park & Ride Filton Abbey Wood Shirehampton Horfield Ashley Down Sea Mills Ashley Hill Clifton Down Tunnel Mangotsfield (1845–1869) Clifton Down Mangotsfield (1869–1966) Redland Staple Hill Montpelier Fishponds Hotwells Halt Warmley Hotwells Narroways Hill Junction Stapleton Road sidings Grey line represents Stapleton Road boundary of Bristol Oldland Common unitary authority area Avon Valley Railway Lawrence Hill Waste depot Bitton Bristol St Philip's Barton Hill Depot St Mary Redcliffe tunnel Avon Riverside Bristol Temple Meads Bristol Temple Meads Princes' Wharf Kelston Bristol Harbour Railway St Philip's Marsh T&RSMD SS Great Britain East Depot Bristol Docks (North) Bedminster Bristol Docks (South) Parson Street CREATE Centre Mangotsfield to Bath line South Liberty Lane Depot Ashton Gate St Anne's Park Clifton Bridge Brislington Nightingale Valley Halt Long Ashton Ham Green Halt Bristol–Exeter line Pill Whitchurch Halt Portbury shipyard Keynsham Royal Portbury Dock Bristol & North Somerset Rly Portbury Shipyard Saltford Portbury Great Western Main Line (1954–1964) Portishead Weston, Clevedon and Portishead Light Railway (1879–1954) Portishead Portishead Pier

St Philip's Marsh is located close to Bristol Temple Meads railway station, on the Great Western Main Line. St Philip's Marsh depot is a train maintenance depot located within the district.

Originally developed by the Great Western Railway as a twin-turntable facility for freight locomotives, it was closed to steam in June 1964 and redeveloped as a diesel depot. Owned by Network Rail under depot code PM, it is leased to train operator Great Western Railway, and has been used since their introduction for the maintenance of InterCity 125 trains operating between London Paddington, Bristol and South Wales. Both Class 43 power cars and Mark 3 coaching stock are serviced here.

Following the merger of First Great Western (FGW) and Wessex Trains operations into one new franchise in 2006, St Philip's Marsh took over the maintenance of FGW's fleet of diesel multiple units, previously maintained at Cardiff Canton TMD by Arriva Trains Wales. The move allowed the removal of the need for the majority of trains operating area, mostly in the West Country, requiring to travel through the congested Severn Tunnel.

• Map of St Philip's Marsh circa 1900
• An overhead view of St Philip's Marsh T&RSMD.