Pekan Seria Mosque is located in the heart of town. The mosque was built in 1953 on the site of 2 acres of land and construction was completed in 1954 at a cost of $ 250,000.00. mosque official opening was officiated by His Royal Highness Maulana Al-Sultan Sir Muda Omar Ali Saifuddien Sa'adul Khairi Waddien on Sunday, 21. Muharram, 1374 corresponding to 19th. September, 1954. Due to the number of residents and pilgrims are increasing the number of times that modification was done in 1970 and 1982. Capacity mosque can accommodate 2,000 worshipers.Amongst the facilities there is room in the mosque libraries and complete funeral room.