Don Frank Hettiarachchi was a Ceylonese politician. Hettiarachchi was first elected to parliament, as the member for the Nivitigala electorate, at the 1st parliamentary election, held between 23 August 1947 and 20 September 1947, representing the Lanka Sama Samaja Party. He received 5,626 votes, narrowly defeating the United National Party candidate, Jayaweera Kuruppu, by 24 votes. This was a significant upset as Kuruppu was a former member of the State Council of Ceylon and a principal organiser for the UNP in the district. He re-contested the seat at 2nd parliamentary election, held between 24 May 1952 and 30 May 1952, losing to the UNP candidate Harold Weragama, who polled 12,785 votes as opposed to Hettiarachchi's 9,257 votes. Hettiarachchi ran again in the 3rd parliamentary election, held between 5 April 1956 and 10 April 1956, however this time as the Sri Lanka Freedom Party candidate, successfully regaining the seat of Nivitagala. He received 16,205 votes, 7,985 votes ahead of his UNP rival and sitting member, Weragama. At the 4th parliamentary election, held on 19 March 1960, Hettiarachchi ran as the Mahajana Eksath Peramuna candidate, winning the seat with 7,314, 1,417 votes ahead of the UNP candidate, K. E. Seneviratne, and 4,581 votes ahead of the SLFP candidate, A. D. Abeysuriya. However, as neither of the major political parties managed to obtain a sufficient majority in the election a new election was called. At the subsequent July 1960 election Hettiarachchi lost the seat to the SLFP candidate, Stanley Molligoda, running third in a field of four candidates, only securing 22.6% of the total vote. Hettiarachchi contested the next parliamentary elections, held on 22 March 1965, this time as the SLFP candidate, where he defeated the sitting member, Molligoda, who ran as the UNP candidate. Hettiarachchi polled 14,943 votes, as opposed to Molligoda's 9,981 votes. Hettiarachchi died shortly before the May 1970 parliamentary elections, with the vacant seat of Nivitagala being filled by his SLFP replacement, Piyadasa Harischandra.
