Nakornpayap International School

The oldest secular international school in Chiang Mai. WASC-accredited American curriculum, founded 1993, with a steady reputation among long-term expat families.

Around 300 students, Early Years through Grade 12, on a campus in San Phi Sua, Mueang. Non-denominational, which sets it apart from Grace and CDSC. American curriculum and small enough that teacher-to-student ratios are favourable, with families noting individual attention as a real strength.

Early Childhood parents are particularly positive: children attached to teachers, engaged days. At secondary level, the picture is more mixed. There have been parent concerns over a recent high school renovation and around fee changes and board decisions, with at least some families moving on for those reasons. The academic offer is solid for families looking for an American pathway in a smaller, less corporate setting than the larger Bangkok schools.

• Nakornpayap is grouped with Chiang Mai International, Lanna and American Pacific as the city's mid-tier US-curriculum option, with the only tier-one Chiang Mai school described as Prem 45 minutes north.
• A r/chiangmai parent thread asks specifically how NIS is, signalling active interest from incoming families.
• WASC accreditation, AP options and a US standards-based programme are repeatedly named; campus facilities (pool, gym, fields) come up as well kept.
• Critical signal centres on tuition increases, board governance and concerns around school meals and water; some families have left over these.
• Older reviews praise teachers and atmosphere; the more recent and consistent friction is institutional rather than instructional.