We present the results of lichenological research in 20 Latvian manor parks. In total 62 lichen taxa and one lichenicolous taxa (Muellerella hospitans Stizenb.) were identified on 18 tree taxa. In total, five lichen species were specially protected, eight were Woodland Key Habitat indicator species and two species were red-listed in Latvia. Keywords: biodiversity, urban diversity, lichenized fungi.