Approximately 740 species of Heteroptera have been hitherto recorded in Poland, including 705 species of the so called “terrestrial true bugs”. Data on their distribution in our country come mainly from the faunistic and ecological research. However, Heteroptera species faunistic lists often omit locations of specimens used in various kind of molecular studies due to several reasons: (1) such data are not always included in the source paper, (2) the location is given in the description of the nucleotide sequence of the specimen only in the GenBank, (3) the differences between typical faunistic and molecular studies result in inadvertent omission of the latter. The paper presents a list of 20 species which specimens have been collected in Poland and were used in various molecular studies. The detailed data on the collecting localities for each species are provided even when they are not included in the original papers.