Microarrays are one of the modern technologies for analyzing biological polymers (DNA, RNA, antibodies, etc.). The main advantage of microarrays is the ability to simultaneously analyze a large number of different molecules in one sample. Microarrays are actively used to develop diagnostic tools, including in the analysis of community-acquired pneumonia pathogens. The relevance of studying community-acquired pneumonia is determined by the consistently high incidence, diversity of pathogens and their high genetic variability, as well as the recent spread of a new coronavirus infection. This review describes microarray technologies used to solve fundamental and clinical problems in the study of pathogens of community-acquired pneumonia and some other respiratory infections.