St Karen's Montessori School is a minority Anglo-Indian Christian institution based in Patna, India.

The school derives its name from the novel Karen written by Marie Killilea in 1952.

St. Karen's Secondary School is a minority Anglo-Indian Christian institution and has been established by The Anglo–Indian Educational Society of St. Karen's, which is a registered body.

The main school campus is located in Bailey Road area of Rukanpura, Patna.

The school is affiliated to the Central Board of Secondary Education, New Delhi.