The evidence based concerning the relationship between loneliness and the perception of facial cues of emotion remains mixed. This study further examined the categorisation accuracy, and perceived emotional intensity and emotional valence of facial expressions of emotion in adults displaying high, medium, and low levels of loneliness, whilst controlling for symptoms of insomnia anxiety and depression. Using the University of California Loneliness Scale, participants were stratified into those experiencing high (N=83), medium (N=97), and low levels (N=93) of loneliness. Observing facial expressions of emotion from the Karolinska Directed Emotional Faces database, participants were assessed on their categorisation accuracy and ratings of emotional intensity and valence. Greater levels of loneliness were associated with positively valanced ratings of angry faces; negatively valanced ratings of facially expressed sadness and happiness; and difficulties in identifying happy faces after controlling for comorbid psychiatric symptoms. The outcomes present psychosocial implications for individuals experiencing loneliness.