Keloids is a fibroproliferative disease. The incidence of keloids among Asians has not been thoroughly studied. The objective of this study is to determine the incidence of keloids in Taiwan, which mainly consists of ethnic Chinese. Furthermore, we want to determine the comorbidity rate of other fibrosis-related diseases among keloid patients. This study was based on the National Health Insurance Research Database, which contains the data of 1 million randomly selected patients. Multivariate logistic regression analyses were employed to estimate the relative odds of keloids as a function of fibrosis-related diseases. The annual keloid incidence rate in Taiwan was 0.15 % for the general population. With a 1.33 ratio, women outnumbered men. Women with uterine leiomyoma have a 2.25-fold greater risk of keloids, compared with women without leiomyoma. We concluded that keloid incidence in Taiwan is approximately 0.15 %. Women with leiomyoma have a greater risk of keloids, this implicates that both diseases share a common etiopathological pathway.