London Buses route 172 is a Transport for London contracted bus route in London, England. Running between Brockley Rise and St Paul's, it is operated by Abellio London.
Route 172 commenced operating on 1 February 1992 between Grove Park and Finsbury Square via Catford - Brockley - New Cross - Elephant & Castle - Blackfriars - St Paul's - London Wall as a Monday to Saturday service. The route was initially operated by London Central from their New Cross (NX) garage using Leyland Titans and ECW bodied Leyland Titans. The route was introduced to partly replace the southern part of route 141.
On 14 March 1992, it was extended from Catford garage to Bromley North Station via Route 208 and Catford (TL) garage gained a Monday to Saturday allocation.
On 18 July 1992, the route was diverted at London Wall from Finsbury Square to Liverpool Street station, partly replacing Red Arrow route 502.
On 12 March 1994, it was withdrawn south of Brockley Rise, this section was replaced by rerouting route 171 to Catford and the Catford (TL) allocation was withdrawn. The Saturday service was withdrawn at the same time.
On 20 September 1999, route 172 was rerouted to operate via Waterloo and terminate at St Paul's, this section being replaced by route 100.
On 18 March 2000, a Saturday service was reintroduced and a Sunday service was introduced.
On 17 March 2001, the route was retained by London Central.
In May 2001, the route was converted to low floor using Plaxton President bodied Volvo B7TLs.
On 18 May 2006, the route was retained by London Central.
In February 2017, the Alexander ALX400 bodied Dennis Tridents were replaced by Wright Eclipse Gemini bodied Volvo B7TLs.
Route 172 operates via these primary locations:
- Brockley Rise
- Crofton Park Station
- Brockley Station
- New Cross Gate Station
- Elephant & Castle Station
- Waterloo Station
- Ludgate Circus
- St Paul's Station
- St Paul's King Edward Street