For this revision of <em>Porpidia</em> species from Poland, 1400 specimens from public and private Polish herbaria, as well as other major European herbaria, were examined. The taxonomy, chemistry, habitat requirements and distribution of <em>Porpidia albocaerulescens</em>, <em>P. cinereoatra</em>, <em>P. contraponenda</em>, <em>P. crustulata, P. flavocruenta, P. grisea, P. macrocarpa, P. melinodes, P. nigrocruenta, P. soredizodes, P. speirea, P. superba, P. thomsonii, P. tuberculosa</em> and <em>P. zeoroides</em> in Poland are presented. <em>Porpidia thomsonii</em> is reported as new to Poland and Central Europe. New records of <em>P. contraponenda</em> very rare species in Poland, are given. The occurrence of <em>P. flavicunda, P. hydrophila, P. rugosa</em> and <em>P. trullisata</em> has not been confirmed during this study, therefore their status remain unknown. The lichenicolous fungi, <em>Endococcus propinquus, E. </em>aff.<em> propinquus</em> and <em>Muellerella pygmaea</em> on <em>Porpidia</em> were also noted during this study. As a result of examination of extensive reference material <em>P. macrocarpa</em> is recorded for the first time for Bulgaria and Ecuador, <em>P. speirea</em> − for Bulgaria, and <em>P. soredizodes</em> − for Ecuador and Mexico. A key to taxa in Poland, including those with unconfirmed occurrence there, is provided.