Introduction: ADHD often persists into adulthood, with high comorbidity complicating diagnosis, particularly in women, who are less frequently diagnosed and typically present with the inattentive subtype. This study examined ADHD comorbidity in women with depressive or anxiety disorders and compared clinical features, including hyperfocus, between those with and without ADHD. Materials and Methods: Female patients from outpatient clinics completed the Beck Depression Inventory (BDI) and Beck Anxiety Inventory (BAI). Those meeting threshold scores underwent further assessment using the Wender-Utah Rating Scale (WURS), Hyperfocus Scale (HS), and Adult ADHD DSM-IV-Based Diagnostic Screening Scale, alongside structured clinical interviews (SCID-5-CV). After exclusions, 170 women were included. Results: ADHD was identified in 19.6% (n=33) of patients, 45.5% (n=15) of whom were previously undiagnosed. ADHD was most prevalent in patients with social anxiety disorder (46.4%), double depression (39.4%), dysthymia (35.1%) and generalized anxiety disorder (25.5%). In non-ADHD participants, hyperfocus scores correlated positively with depression and anxiety, but no such correlations were found in the ADHD group. Conclusions: ADHD is common in women with depressive or anxiety disorders and is often underdiagnosed, with hyperfocus as a notable but non-exclusive feature. Clinicians should consider ADHD in this population to improve diagnostic accuracy.