A triple mosque was also constructed in the Niz Galua Mia Bari which also remains as one of the archeological tourist attractions of Rajapur.

[6] Rajapur was also home to a zamindar family in Saturia descended from Khan Jahan Ali's disciple Shaykh Ahmad Sajenda.

Sajenda's descendant Sheikh Shahabuddin (1626-1745) assisted the widow of Pran Narayan, the zamindar of Rayerkathi, in restoring their zamindari privileges by visiting the court of the Nawabs of Bengal in Murshidabad.

In 1919, Maulana Mahtabuddin Khan established the Imdadul Uloom Ashrafia Madrasa in Galua which had a big impact on educationally serving the people of Rajapur.

During the Bangladesh Liberation War of 1971, a brawl took place between the Bengali freedom fighters against the Pakistan Army on 21 October at the Rajapur thana (police station compound).

Dilwar Husayn of Gopalpur village was appointed as a sub-sector commander for Dinajpur under Sector 6 and later awarded Bir Protik.

[10] The status of Rajapur Thana was upgraded to upazila (sub-district) in 1983 as part of the President of Bangladesh Hussain Muhammad Ershad's decentralisation programme.