The UNP won the postal vote in Polonnaruwa District with 8,454 (57.45%) while the UPFA managed only 5,031 votes.

This is a complete turn-around from the election in 2010.

The UPFA had a comprehensive lead in postal votes in 2010 with 10,305 (75.36%) postal votes while the UNP won only 2,691 votes. Polonnaruwa is the home district of President Maithripala Sirisena.