The aim of the study was to determine the total protein content of selected ripened rennet cheese, processed cheese, and cheese-like products available in a retail chain in Lublin. A total of 23 kinds of cheese made from cow milk were tested, including 16 ripened rennet cheeses, 4 processed cheeses, and 3 cheese-like products. Protein content was determined in each sample by the Kjeldahl method. Among all the cheeses tested the processed cheeses were the poorest source of protein (from 8.07 to 9.06%). Ripened rennet cheeses had the highest content of this protein, particularly one of the Emmentaler cheeses (29.20%). In no case was a significant difference noted between the protein content obtained and the value stated by the manufacturer, which indicates that labelling of products is reliable in this regard