This study was designed to provide some preliminary information about the imaginary companions created by children who have lived in foster care, including prevalence rates and qualitative descriptions of the imaginary companions. We were also interested in how descriptions of the imaginary companions created by children who had lived in foster care compare to those of other children. Children with a history of foster care (n =21) and children from a low socioeconomic status community sample (n =39) were interviewed about imaginary companions. Twenty-six children (43.3%) reported having imaginary companions. Although having an imaginary companion has sometimes been believed to be more common in children with a history of maltreatment, in this preliminary study, prevalence rates did not differ between the two groups of children. In addition, both groups of children described companions that were a positive source of entertainment, friendship, and social support.