St. Thomas Mount railway station, locally known as Mount railway station or Parangimalai station, is one of the railway stations of the Chennai Beach–Chengalpattu section of the Chennai Suburban Railway Network. It serves the neighbourhood of St. Thomas Mount and Pazhavanthangal, which are suburbs of Chennai. It is located at a distance of 17 km (11 mi) from Chennai Beach terminus, with an elevation of 11 m (36 ft) above sea level.

The station is also an integrated railway station for all the three modes of rail transport in the city, namely, Chennai suburban railway, MRTS, and Metro Rail. The MRTS part is under construction.

St. Thomas Mount
Chennai Metro station
General information
Line(s)	Green Line Red Line
Platforms	Side platform Platform-1 → Train Terminates Here Platform-2 → M.G.R Chennai Central
Tracks	2
Construction
Structure type	Elevated
Platform levels	1
Other information
Station code	SMM
History
Opened	14 October 2016 (2016-10-14)
Electrified	Single-phase 25 kV 50 Hz AC overhead catenary
Services
Preceding station Chennai Metro Following station Alandur towards Chennai Central Green Line Terminus Alandur towards Madhavaram Milk Colony Red Line Adambakkam towards Sholinganallur
Route map Legend Chennai Suburban Railway South Line & South West Line Blue Line M.G.R Central Blue Line MRTS Egmore Chennai Suburban Railway South Line & South West Line Nehru Park Kilpauk Medical College Purple Line Pachaiyappa's College Shenoy Nagar Anna Nagar East Anna Nagar Tower Thirumangalam Red Line Chennai Port-Maduravoyal Expressway Cooum River NH 4: EVR Periyar Salai Koyambedu depot Koyambedu Red Line Jayalalithaa CMBT Arumbakkam Vadapalani Orange Line Ashok Nagar Adyar River Ekkattuthangal Kathipara Junction Arignar Anna Alandur Blue LineRed Line Blue Line St. Thomas Mount  MRTS  Red Line Chennai Suburban Railway South Line & South West Line
Location

St. Thomas Mount Metro station is a Metro-cum-MRTS railway station on the Green Line of the Chennai Metro. The station is an elevated station abutting the surface-level St. Thomas Mount suburban station of the Chennai Suburban Railway Network. The metro level of the station started functioning on 14 October 2016 while the MRTS level is under construction.

The new terminal is envisaged as an integrated railway station for all the three modes of rail transport in the city, namely, Chennai Beach—Chengalpattu section of the Chennai Suburban Railway, terminal point of Chennai Beach—St. Thomas Mount MRTS, and Chennai Central–St. Thomas Mount Metro Rail.

The station will include access to all the 3 suburban rail modes of the city, at multiple levels. The integrated station will have three levels, namely, ground level for suburban station, level 1 for MRTS, and level 2 for Metro Rail. The length of the platform at the Metro station will be 140 m and the entire station complex will have a total built-up area of 48,000 sq m.

The existing suburban station at ground level can be accessed from new terminal using a foot overbridge.

As per the new design, the elevated station will have a Metro Rail station on the top floor, followed by an MRTS station a level below and then a vast concourse area for commuters to switch over to these two modes or to step down to the ground level, which will house – new ground level platform – for suburban trains, within the new Station block.

G	Street level	Exit/Entrance & ticket counter
P1	FOB, Side platform | Doors will open on the left
	Platform 1	Towards → Chennai Beach Next Station: Guindy
	FOB, Island platform | P1 Doors will open on the left/right | P2 Doors will open on the right
	Platform 2	Towards ← Tambaram / Chengalpattu Jn / Villuppuram Jn Next Station: Pazhavanthangal
	Platform 3	Towards → Chennai Egmore
	FOB, Island platform | P3 and P4 | (Express Line)
	Platform 4	Towards ← Chengalpattu Junction
P1

The concourse will have ticket booths and escalators and lifts will take commuters to the platforms above.

The MRTS will be at a height of 12 m.

The station is among the elevated stations coming up along corridor II of the Chennai Metro, Chennai Central–St. Thomas Mount stretch. The station will be the largest of the elevated stations of the Chennai Metro and will come up at a height of 23 m.

G	Street Level	Exit/Entrance
L1	Mezzanine	Fare control, station agent, Metro Card vending machines, crossover
L2	Side platform | Doors will open on the left
	Platform 2 Northbound	Towards → Chennai Central Next Station: Arignar Anna Alandur Change at the next station for Blue Line
	Platform 1 Southbound	Towards ← Train Terminates Here
	Side platform | Doors will open on the left
L3	Side platform | Doors will open on the left
	Platform 3 Southbound	Towards → Sholinganallur Next Station: Adambakkam
	Platform 4 Northbound	Towards ← Madhavaram Depot Next Station: Alandur
	Side platform | Doors will open on the left

The station lies in the Chennai Beach–Tambaram section of the Chennai Suburban Railway Network, the first suburban section of the city. With the completion of track-lying work in March 1931, which began in 1928, the suburban services were started on 11 May 1931 between Beach and Tambaram, and was electrified on 15 November 1931, with the first MG EMU services running on 1.5 kV DC. The section was converted to 25 kV AC traction on 15 January 1967.

As of 2012, an integrated terminal for Chennai Metro and MRTS is under construction at the station complex at a cost of ₹ 780 million. The construction is expected to be completed by September 2013. The ₹ 780-million contract for the construction of the station was initially awarded to Consolidated Construction Consortium Limited (CCCL). However, owing to delay the contract was terminated and is being given to a new contractor.

As of 2023, the station had a footfall of 30,000 passengers a day. The task of upgrading of the station was taken up in 2023 under Indian Railway's "Amruth Bharath" scheme at a cost of ₹ 141.5 million.

With the integration of five modes of public transport – suburban railway, Southern Railway, Metro Rail, MRTS and public buses the station is expected to become the city's largest transit hub after Chennai Central.

A two-lane circular road has also been planned around the station so that buses can pick up commuters. Anticipating increased patronage upon the completion of Metro Rail, the Medavakkam-Madipakkam road that runs in front of the station is being widened. It is expected that MRTS and metro rail services will together bring in more than 100,000 commuters at the station.

Parking facility include 10,000 sq m space at the ground level and provisions for 3,000 two-wheelers at level 1. Upon completion, the station will be the third largest in the city after Chennai Central and Chennai Egmore.

In June 2013, Southern Railway started the ground work to extend platforms at the station to halt express trains. A spare platform of the station, which is being used to park old rakes, is being extended at an estimated cost of ₹ 60 million. The platform, which can currently take only 22-coach trains, will be expanded to handle 24-rake trains and a link track will be laid.

It is one of the 73 stations in Tamil Nadu to be named for upgradation under Amrit Bharat Station Scheme of Indian Railways.

• Railway stations in Chennai
• List of Chennai metro stations
• Chennai Suburban Railway
• Chennai Metro

• St. Thomas Mount railway station on IndiaRailInfo.com
• Official website for Chennai Metro Rail Limited