One of the most important ways to create climate-resilient landscapes in cities is the use of plants with high ecological tolerance in urban open-green spaces. The aim of this study is to evaluate the ecological tolerance factors (frost, salinity, wind, air pollution, and drought) of woody plants in sample city parks of Kilis city (Karataş Park, Fıstıklı Park, and Şehit Terzi Muzaffer Aydemir Park) and to determine if there is a significant difference between the parks in terms of these factors. Firstly, the general area uses, plant species and numbers, and the taxa/natural distribution areas of the plants in each park were determined, and these plants were evaluated according to the factors. Whether there is a significant difference between the ecological tolerance values of plant species in the parks was determined using the "Kruskal-Wallis H-Test for Independent Group”. The study findings indicate that there are no significant differences at the p ≤ 0.05 level in frost, wind, salinity, and air pollution tolerances between the parks; however, there is a significant difference in drought tolerance.