Athens railway station (Greek: Σιδηροδρομικός Σταθμός Αθηνών, romanized: Sidirodromikos Stathmos Athinon) is the main railway station of Athens, and the second largest station in Greece. Located in the central quarter of Kolonos, the railway station resulted from the merger of two separate railway terminals in 2005—Larissa station (Σταθμός Λαρίσης, Stathmos Larisis) of the Piraeus–Platy railway towards central and northern Greece, and the Peloponnese station (Σταθμός Πελοποννήσου, Stathmos Peloponnisou) of the Piraeus–Patras railway that formerly linked Athens with the Peloponnese.

The station is still colloquially known as Larissa Station, and is also the name of the adjacent Athens Metro station.

Inaugurated in 1904, the station was named after the city of Larissa (then the northernmost city of the Kingdom of Greece) and the one nearest the northern terminus of the standard-gauge Piraeus–Papapouli railway. The adjacent Peloponnese Station, inaugurated on 30 June 1884, was served by the metre-gauge Piraeus–Patras railway to the Peloponnese. In 1920 Hellenic State Railways or SEK was established; however, many railways, such as the SPAP continued to be run as a separate company, becoming an independent company once more two years later.

Due to growing debts, the SPAP came under government control between 1939 and 1940. During the Axis occupation of Greece (1941–44), Athens was controlled by German military forces, and the line was used for the transport of troops and weapons. During the occupation (and especially during the German withdrawal in 1944), the network was severely damaged by both the German army and Greek resistance groups. The track and rolling stock replacement took time following the civil war, with regular service levels resumed around 1948. In 1954 SPAP was nationalized once more. In 1962 the SPAP was amalgamated into SEK. In 1970, OSE became the legal successor to the SEK, taking over responsibilities for most of Greece's rail infrastructure. On 1 January 1971, the station and most of the Greek rail infrastructure were transferred to the Hellenic Railways Organisation S.A., a state-owned corporation. Freight traffic declined sharply when the state-imposed monopoly of OSE for the transport of agricultural products and fertilisers ended in the early 1990s.

In 2003, the Hellenic Railways Organisation (OSE) launched the Athens Suburban Railway (Proastiakos) as a subsidiary responsible for the establishment of a suburban rail network in the Athens metropolitan area for the 2004 Summer Olympics. Peloponnese Station was closed on 7 August 2005, along with the metre-gauge line between Piraeus and Agioi Anargyroi. Its services were transferred to Larissis Station upon the opening of the Suburban Railway line to Corinth on 27 September 2005. In 2005, TrainOSE was created as a brand within OSE to concentrate on rail services and passenger interface. In 2008, all Athens Suburban Railway services were transferred from OSE to TrainOSE.

The final service departed the unmodernized Larissis Station on 4 June 2017 before it was closed for various upgrades, including the installation of a railway electrification system. The upgraded station was reopened on 30 July 2017. The Athens Metro station, inaugurated on 28 January 2000, lies underground and is served by Line 2 between Anthoupoli and Elliniko. In July 2022, the station began being served by Hellenic Train, the rebranded TrainOSE.

The station comprises a large, two-floor building in central Athens. Three platforms and four tracks are currently in use. The second phase of upgrades is underway, including the construction of new tracks and platforms, a central underpass connecting all platforms and the metro station, additional pedestrian underpasses and overpasses, building restoration works and an overhaul of road traffic surrounding the station. In the meantime, trains will continue to use the platforms and tracks built during the previous upgrade, located where the goods yard of the old Peloponnese Station once stood.

Various Hellenic Train services call at the mainline station, including the InterCity and InterCity Express (ETR) service towards Larissa and Thessaloniki, and the Athens Suburban Railway towards the rest of Attica and the northern coast of the Peloponnese.

The station is served the following lines of the Athens Proastiakos or suburban railway:

• Athens Suburban Railway Line A1 between Piraeus and Athens Airport, with up to one train per hour;
• Athens Suburban Railway Line A3 towards Chalcis, with up to one train every two hours, and one extra train during the peak hours;
• Athens Suburban Railway Line A4 between Piraeus and Kiato, with up to one train per hour.

Since 15 May 2022, the following weekday following Hellenic Train services call at this station:

• InterCity Express (ETR): two trains per day in each direction, to Thessaloniki;
• InterCity (IC): five trains per day in each direction to Thessaloniki with additional stops, and one train per day in each direction, to Kalambaka;

During the twentieth century, especially in the first half, Athens station was the terminus for some international trains, such as an Express to Berlin (departing from the former Anhalter Bahnhof) or the "Arlberg" route of the Orient Express (London-Athens via Paris-Zürich-Vienna-Budapest-Belgrade-Skopje), in service until 1962 and then of the Direct Orient Express (Paris-Lausanne-Venice-Ljubljana-Zagreb-Belgrade-Skopje) until 1976.

The underground Larissa Station is served by Athens Metro Line 2 trains towards Anthoupoli to the north, and Elliniko to the south.

The station is also served by local and regional buses:

Transport for Athens operates Lines 790, A10, A15, B10, B15 while OSE operates some services.

The 1 Trolleybus also calls at the station.

Note: All services are accessible from the forecourt.

Level L1	Platform 11	→ Not in regular use
	Island platform, doors will open on the left, right
	Platform 10	→ to Chalcis (Agioi Anargyroi) →
	Platform 9	← to Piraeus (Rouf)
	Island platform, doors will open on the left, right
	Platform 8A	→ towards Thessaloniki (Oinoi / Larissa) →
	Platform 8Β	→ towards Leianokladi (SKA) →
	Platform 7	→ to Athens Airport / to Kiato (Agioi Anargyroi) →
	Island platform, doors will open on the right
	Platform 6	→ Under reconstruction
	Platform 5	→ Under reconstruction
	Island platform, doors will open on the left, right
	Platform 4	→ Under reconstruction
	Platform 3	→ Under reconstruction
	Island platform, doors will open on the left, right
	Platform 2	→ Under reconstruction
	Platform 1	→ Under reconstruction
	Side platform, doors will open on the right
Ground/Councourse G/C	Customer service	Shops/Buffet Tickets/Exits
Theodorou Diligianni Street
Ground/Concourse G/C	Customer service	Tickets Exits
Level L2	Side platform, doors open on the right or interchange to
	Platform 12	← towards Elliniko (Metaxourgeio)
	Platform 13	→ towards Anthoupoli (Attiki) →
	Side platform, doors will open on the right or interchange to /

The work comprises the construction of lines 1-6, part of the underground crossing providing a connection to all the platforms and the connection to “Larissa” station, of Attiko Metro S.A. as well as the inclusion of provisional sheds and E/M works at ground level. The works will be implemented without rail traffic interruption, with the electrified right half corridor of the Railway Station (Lines 7-10) in operation and the uninterrupted passenger access from the east (Diligianni street) and the west (Konstantinoupoleos street) secured.

• 
  View of the station with metre gauge and normal gauge rails, 1979.
• 
  A Athens Suburban Railway DMU at the station in 2005, before electrification in 2017.
• 
  An Alstom first-generation EMU at the metro station, 2010.
• 
  The heritage-listed building of the now closed Peloponnese Station, 2007.

• Railway stations in Greece
• Hellenic Railways Organisation
• Hellenic Train
• Thessaloniki railway station
• P.A.Th.E./P.
• Athens Suburban Railway
• Railways of Greece

• Media related to Athens Larissa Station at Wikimedia Commons