The station opened on 21 March 1895.[2] The station building was rebuilt in 2012, with the new station building opened on 8 March 2012. The former west entrance closed from this date.[4]
Station numbering was introduced on all Seibu Railway lines during fiscal 2012, with Tokorozawa Station becoming "SS22" on the Seibu Shinjuku Line and "SI17" on the Seibu Ikebukuro Line.[5]
In fiscal 2019, the station was the 7th busiest on the Seibu network with an average of 102,368 passengers daily.[7] The passenger figures for previous years are as shown below.
^所沢駅新駅舎で施設見学会 [Preview of new Tokorozawa Station building]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 4 March 2012. Retrieved 4 March 2012.
^西武線全駅で駅ナンバリングを導入します [Station numbering to be introduced at all Seibu stations] (PDF). News Release (in Japanese). Japan: Seibu Railway. 23 February 2012. Archived from the original(PDF) on 24 September 2015. Retrieved 10 February 2013.
^東急東横線・メトロ副都心線相互直通、16日スタート [Tokyu Toyoko Line and Tokyo Metro Fukutoshin Line inter-running to start on 16 March]. Nikkei.com (in Japanese). Japan: Nikkei Inc. 15 March 2013. Retrieved 2 April 2013.
^駅別乗降人員(2019年度1日平均 [Average daily station usage figures (fiscal 2019)] (PDF) (in Japanese). Japan: Seibu Railway. Retrieved 6 January 2021.
^ ab駅別乗降人員 2010(平成22)年度 1日平均 [Average daily station usage figures (fiscal 2010)] (PDF) (in Japanese). Japan: Seibu Railway. Archived from the original(PDF) on 26 June 2011. Retrieved 26 January 2013.
^駅別乗降人員 2011(平成23)年度 1日平均 [Average daily station usage figures (fiscal 2011)] (PDF) (in Japanese). Japan: Seibu Railway. Archived from the original(PDF) on 1 November 2012. Retrieved 26 January 2013.
^ ab駅別乗降人員 2013(平成25)年度 1日平均 [Average daily station usage figures (fiscal 2013)] (PDF) (in Japanese). Japan: Seibu Railway. Archived from the original(PDF) on 14 July 2014. Retrieved 22 June 2014.