With the increasing role of senior citizens in modern societies it is important to know, inter alia, their transportation preferences and travel behaviour. The article presents the definition of a senior citizen taking account of different age of a person defining the beginning of this stage in life. Afterwards, various stages of seniors’ lives were distinguished as regards changes in lifestyle. The average life expectancy was also specified, defining the beginning of senior stage of life. The main part of this article was dedicated to the specificity of transportation preferences and travel behaviour of seniors as a specific group of the inhabitants of Gdynia, located within Gdańsk Metropolis. To this end, the data gathered during representative research conducted in 2015 was used. By analysing the data it was possible to determine the specificity of seniors’ urban travel purposes and their demands taking particular account of the comfort of travel. The article presents the modes of travel of seniors against all inhabitants considered collectively searching for determinants of choosing a particular mode of travel. Moreover, the article presents differences in assessing the quality of public transport by seniors and all inhabitants of the city. The final part provides conclusions drawn from the conducted research.