Form 1 admission to The Nyambaria School runs through the Ministry of Education's NEMIS national placement system. As a national school, Nyambaria draws boarders from every county in Kenya, based on KCPE performance and school-choice ranking submitted during the national selection process.

Successful applicants should download their official placement letter from the NEMIS portal and prepare the standard reporting checklist — KCPE result slip, birth certificate, passport photographs, a completed medical form and the first-term fee deposit. New Form 1 boarders report on the official date communicated by the school office, with orientation covering dormitory placement, house rules and the academic timetable. Parents and guardians with questions about admission are encouraged to contact the school office directly.