What is the age range for early onset schizophrenia?

Varies: Many doctors are hesitant to diagnose schizophrenia before adolescence. But there are many severe childhood conditions that have pre-schizophrenoform symptoms as early as 5 years old. Many other medical conditions need to be sorted out before these diagnoses are made.

Schizophrenia onset: Schizophrenia, which is a brain disease and affects around one percent of the population, usually begins in one's late teens or early 20s. Early onset schizophrenia is quite rare. A great resource is to check out the work of dr. Judith rapaport from the national institute of mental health. Here she is on youtube: http://www.Youtube.Com/watch?V=kwluvic4x6m.