Koizumimachi Station (小泉町駅, Koizumimachi-eki) is a passenger railway station in the town of Ōizumi, Gunma, Japan, operated by the private railway operator Tōbu Railway. It is numbered "TI-45".

Koizumimachi Station is served by the Tōbu Koizumi Line, and is located 11.9 kilometers from the terminus of the line at Tatebayashi.

The station is composed of a single side platform that accommodates traffic in both directions, complemented by the station building. Benches within the station, located under the roof area, provide passengers with a place to sit and await the arrival of trains. Moreover, a pedestrian bridge situated outside the station ensures smooth access across the railroad.

There are no turnstiles or other barriers in this station. Instead a PASMO-compatible ticket gate which does not have gate function is prepared for PASMO or smart Card train ticket passengers. Conversely, for passengers who do not have a PASMO or smart card train ticket, a machine is available to issue a certificate of the boarding and alighting station.

Koizumimachi Station was opened as a station of the Koizumi Line operated by Jōshū Railway company on March 12, 1917. The Koizumi Line was purchased by Tōbu Railway in 1937.^{[citation needed][2]}

From March 17, 2012, station numbering was introduced on all Tōbu lines, with Koizumimachi Station becoming "TI-45".^[3]

In fiscal 2019, the station was used by an average of 400 passengers daily (boarding passengers only).^[4]

• site of Koizumi Castle
• Ōizumi Post Office ^[ja]
• Koizumi shrine
• Ōizumi High School

• List of railway stations in Japan

• Zenkoku Tetsudo Jijo Daikenkyu ISBN 4-7942-1291-7
• Ekisha Saihakken ISBN 4-533-03675-9
• Tetsudo Haisen Ato o Aruku ISBN 4-533-02743-1

Media related to Koizumimachi Station at Wikimedia Commons

• Tobu station information (in Japanese)