Some 17.1 percent of respondents said in August they would vote for the conservative Homeland Union, unchanged from a similar poll in June. The LVŽS would get 15.8 percent of the vote, slightly up from 15.4 cent, the poll conducted by the pollster Spinter Tyrimai for Delfi.lt showed.
The Order and Justice party came in third with 8 percent, slightly down from 8.2 percent in June.
The latest poll also showed the Labor Party's popularity falling to 4.9 percent, from 6.7 percent.
Gediminas Kirkilas' Lithuanian Social Democratic Labor Party (LSDDP) was in sixth place with 4.5 percent, unchanged from June, followed by the Lithuanian Center Party at number seven with 4.5 percent, up from 2.9 percent.
Support for the Lithuanian Liberal Movement last month declined to 3.8 percent, from 4.6 percent two months earlier.
The Electoral Action of Poles in Lithuania–Christian Families Alliance would receive 3.7 percent of the vote, slightly down from 4 percent.
Spinter Tyrimai polled 1,007 people aged between 18 and 75 years across Lithuania on August 24-31. The results of the survey have an error margin of 3.1 percent.