Ukraińscy migranci zarobkowi w Polsce – dlaczego tak trudno ich policzyć?

The article discusses the characteristics of the Ukrainian labour migration to Poland. The author tries to answer the question of why it is so difficult to estimate the actual number of Ukrainians working in Poland. The first section provides a brief overview of available data and estimates. The following sections focus on selected elements of the migration patterns which cause difficulties in estimating the size of the population of Ukrainian workers. The analyses concern, inter alia, the imperfection of the system of employers’ declarations, alternative channels of legalization of stay, the temporality of migration, preferred job search and remittances sending methods, and the specificity of the main sectors of employment.