Nintavur electoral district was an electoral district of Sri Lanka between March 1960 and February 1989. The district was renamed Sammanthurai electoral district in July 1977. The district was named after the towns of Nintavur and Sammanthurai in Ampara District, Eastern Province. The 1978 Constitution of Sri Lanka introduced the proportional representation electoral system for electing members of Parliament. The existing 160 mainly single-member electoral districts were replaced with 22 multi-member electoral districts. Sammanthurai electoral district was replaced by the Ampara (Amparai) multi-member electoral district at the 1989 general elections, the first under the PR system, though Sammanthurai continues to be a polling division of the multi-member electoral district.