The earliest establishment date of Thuampui UPC Church that can be found in the church records is 18th February 1961. According to another account, some state that it was established during the 1959 Mautam famine year. Since it is difficult to ascertain the exact truth now, the written record is deemed more reliable. Its founders are as follows:

We are unable to know their official designations/positions. At this time, the membership was counted to be around 30 members.

In earlier times, the Sertlangpui District was known as the Thuampui District, and Thuampui served as the District Center. From February 1981 onwards, it was named the Sertlangpui District.

Among the founders, the person whose history is best known to us is Pu Kawlnia. He was someone who deeply loved the Church; when the villagers were regrouped towards Hauruang during the political insurgency, he prioritized the church property—such as large pots, brass gongs, and drums—even over his personal belongings, carrying them down to the regrouping site at Hauruang with great effort. When returning home after regrouping, he carried all these items back himself. To this day, his children continue to be very useful members of the Church.

Because the membership was small when the church was first established, the auxiliary departments (PYD and LAD) were not formed immediately alongside the main church; they were established later as the Church grew more established. Their founding details are as follows: