The Alliance High School student got 86.76 points
Maina, who came third after Karimi Naomi Wawira of Pangani Girls High School, Nairobi and Sharon Chepchumba of Kenya High School, defied boy child neglect that has characterised the education system.
Boys recorded a relatively poor performance with only 4 boys making it in the top twenty students' list.
On the same note, girls schools dominated the list of the best performing schools.
Gideon Maina, the father who spoke shortly after Education CS Dr Fed Matiangi released the results praised his son for the exemplary performance in what seems a female dominated results. Mr Maina is the Vice Chancellor of Pioneer International University.
Naomi Wawaira Karimi on Wednesday appeared before the media after Education CS Fred Matiang'i named her the top student in this year's KCSE exam.
Karimi studied at the Pangani High School and scored a straight A of 87.011 points.
Karimi is one of the 7 girls who made it to the top ten list.
Speaking to KTN News, the top student stated that she looked forward to pursuing a degree in Civil Engineering, with the University of Nairobi being her top choice.