Is schizophrenia on axis I or II?

Schizophrenia is a mental disorder classified on Axis I of the Diagnostic and Statistical Manual of Mental Disorders (DSM).

Axis I includes clinical disorders that are typically accompanied by significant distress or impairment in social, occupational, or other important areas of functioning. These disorders include schizophrenia, mood disorders, anxiety disorders, somatoform disorders, and substance use disorders.