The main aim of the paper is to analyse the possibilities of using big data as a part of a smart city and indicate what challenges cities face during big data analytics implementation. The author divided this paper into three, main sections. In the first part, the author has described a concept of smart city, explaining why this concept has become so important and popular in recent years. In the second part of the article, the author has presented the concept of big data, giving the definition, the most important characteristics and general examples allowing a better understanding of this field. Finally, in a key part of the paper, these two concepts have been combined together to indicate fields they should complement each other to positively influence the cities’ development and achieving its goals. In the last part of the article, the author gave examples of benefits that cities can see in the implementation of the big data analysis, as well as examples of big data projects combined with the cities in which they have been implemented. Results of a paper show that nowadays, the implementation of big data technology may have a positive impact on smart city development.