At the current stage of the development of Ukrainian proper vocabulary, in particular in the post-Soviet period, the subsystem of modern Ukrainian urban names has undergone deeper and more systematic changes. According to linguists, this situation was caused by a distinct development trend such as de-ideologization. After all, the massive nature of the changes observed in Ukrainian urbanonymy, in particular in the western and central parts of Ukraine, is explained by the democratic procedure of replacing the proper names of streets, squares, parks, squares, microdistricts, etc., which, according to current Ukrainian legislation, is implemented on the basis of a resolution of the local council, and not the Verkhovna Rada of Ukraine, as provided by the procedure for changing the proper names of settlements. However, the democratic nature of the procedure for changing Ukrainian urban names, in our opinion, became the main reason for the insufficient or superficial linguistic examination of both urban neologisms and already traditional onims, which enables the functioning of many proper names of urban objects, the structure of which contradicts the norms of the Ukrainian language. Spelling errors are a characteristic type of violation of the norms of the Ukrainian literary language in the subsystem of Ukrainian urban names of the post-totalitarian era. Most often, when writing modern Ukrainian urban names, the rules of capitalization are violated. Urbanonymy is a specific onymic subsystem, which reacts extremely actively to social changes and is especially dependent on the political regime, which is connected with the memorial function of the names of inner-city objects. In this connection, the analysis of the concept of historical memory in urbanonymy becomes especially relevant. the negative influence of the environment affects the ecolinguistic state of various levels and even classes of the Ukrainian onymic vocabulary of the post-totalitarian era differently. Ukrainian anthroponymy, in particular people’s proper names and patronymic names, as well as oikonyms, urbanonyms, ergonyms, are adversely affected at the lexical level. Key words: concept, ecolinguistics, onim.