Hongō-sanchōme Station (本郷三丁目駅, Hongō-sanchōme-eki) is a railway station in Bunkyō, Tokyo, Japan, jointly operated by the Tokyo subway operators Tokyo Metro and Toei Subway. Part of the station originally lay within the Hongō-sanchōme district of Bunkyō Ward when the station was first opened, but following rezoning in 1965, the address of the station became Hongō-nichōme.

• Tokyo Metro Marunouchi Line, station number M-21
• Toei Ōedo Line, station number E-08

The station has two separate sections. There is no underground connection between the platforms, so transfers require surfacing and re-entering. It is easier to change at Kōrakuen.

The Tokyo Metro section of the station is composed of two side platforms serving two tracks.

1	M Marunouchi Line	for Ōtemachi, Shinjuku, and Ogikubo
2	M Marunouchi Line	for Kōrakuen and Ikebukuro

• 
  Marunouchi Line ticket gates, 2018
• 
  Marunouchi Line platforms, 2022

The Toei section of the station is composed of a single island platform serving two tracks.

1	E Ōedo Line	for Iidabashi and Tochōmae
2	E Ōedo Line	for Ryōgoku and Daimon

• 
  Oedo Line platform, 2019
• 
  Entrance, 2022

• 20 January 1954: The Marunouchi Line station opens.
• 1 April 1965: The station address becomes Hongō-nichōme.
• 12 December 2000: The Toei Ōedo Line station opens.
• 1 April 2004: The station facilities of the Marunouchi Line were inherited by Tokyo Metro after the privatization of the Teito Rapid Transit Authority (TRTA) in 2004.

• Tokyo Metro Hongō-sanchōme Station information (in Japanese)
• Toei Hongō-sanchōme Station information (in Japanese)

35°42′24″N 139°45′36″E / 35.706728°N 139.759891°E / 35.706728; 139.759891