The number of private schools has dropped by 40 per cent from 2,240 a decade ago to 1,350 last year.
Over the same period, public schools have increased by 102 per cent from 4,245 in 2007 to 8,297 last year.
The since 2011 has introduced policies that have upset private schools leading to closure of some.
In 2011, Ministry of Education changed the rules for admission to the leading public secondary schools. Only about 20 per cent of students admitted to public national schools come from private schools.
The ban on national examination rankings has denied most private schools publicity.
The government in 2015 also waived exam registration fees for candidates in public primary and secondary schools lifting the burden from parent.
Private schools became popular in Kenya during the 1980s.