Speech fluency disorders are very complex disorders which most commonly occur during the preschool period. In order for parents to recognize the presence of stuttering disfluencies as a difficulty, their awareness of existence of speech fluency disorders and their characteristics is necessary. The aim of this paper is to investigate the awareness of parents who live in the Republic of Croatia about speech fluency disorders and to see if there is a connection between the region in which parents live and the age of children on their awareness of speech fluency disorders. For the purposes of the research, an online survey was created for parents of preschool and school aged children who live in the Republic of Croatia. The study involved 314 parents who were divided into three groups depending on the age of their children and in four groups depending on the region in which they live. Research has shown that there is no statistically significant correlation between the region in which parents live and their awareness of speech fluency disorders. Also, it was noticed that there is no statistically significant correlation between children's age and parents' awareness of speech fluency disorders. In general, parents demonstrated poor knowledge of the etiology, prevalence and therapy of speech fluency disorders and it is even more emphasized when it comes to cluttering. Although more detailed researches are desirable in the future, this paper indicates the need for extensive informing of parents all over the Republic of Croatia about speech fluency disorders.