The study explores the issues connected with diversity and inclusion in the workplace and their application in internal branding. The authors draw attention to the depth of the problematics and identify the gaps in research results concerning the meaning of diversity management as a method of creating corporate image of the organization, both externally and internally.The purpose of the research is to investigate employees' perceptions on diversity in the workplace. It will develop insight into and knowledge of the current state of diversity in the workplace in Poland. Secondly, the results of the research are meant to help to accelerate the process of adapting and changing current management practices to meet the demands of a diversifying workforce. Besides, the authors investigate how diversity management can become an effective tool for internal branding as a crucial success factor.In the statistical study, the Mann-Whitney U test was used to assess differences between women and men. In the case of an independent variable related to the position held in the organization, the Kruskal-Wallis ANOVA analysis was used for comparison. In order to assess the relationship between nominal features, the Fisher's exact test -the chi-squared test was applied with the Yates's continuity correction for a 2x2 contingency table. For these tables, the contingency coefficient C of correlation was calculated. In the case of the scaled variables, to evaluate the relationship between them and the answers to the questions asked, Spearman's rank correlation coefficients were calculated.