Musashi-koyama Station (武蔵小山駅, Musashi-koyama-eki) is a railway station on the Tokyu Meguro Line in Shinagawa, Tokyo, Japan, operated by the private railway operator Tokyu Corporation.

Musashi-koyama Station is served by the Tokyu Meguro Line, and lies 2.6 km from the starting point of the line at Meguro.

This station has two island platforms serving four tracks. Local trains typically use tracks 1 and 4, while express trains use tracks 2 and 3.

1/2	MG Tokyu Meguro Line	for Ōokayama, Den-en-chōfu, Musashi-Kosugi, and Hiyoshi SH Tōkyū Shin-yokohama Line for Shin-Yokohama Sōtetsu Main Line for Ebina via the Tōkyū/Sōtetsu Shin-yokohama Line
3/4	MG Tokyu Meguro Line	for Meguro N Tokyo Metro Namboku Line for Akabane-Iwabuchi  SR Saitama Rapid Railway Line for Urawa-Misono I Toei Mita Line for Nishi-takashimadaira

The station opened on 11 March 1923, initially named simply Koyama Station (小山駅). It was renamed Musashi-koyama in June 1924.

The station was rebuilt as an underground station, reopening on 2 July 2006.

Year	Ridership
2010	46,733
2011	47,425
2012	48,848
2013	50,999
2014	51,337
2015	52,142
2016	52,369
2017	53,186
2018	53,952

• Hoshi University

• List of railway stations in Japan

• Official website (in Japanese).

35°37′13″N 139°42′17″E / 35.6203°N 139.7047°E / 35.6203; 139.7047