Few outstanding scholarship passes are achieved nationally per subject.
St Paul's students gained four of the 27 outstanding scholarship passes in chemistry and one of four available in science.
Examination marks in mathematics with statistics were also high with students gaining 10 scholarship passes, including three outstanding, while calculus students gained five passes, including two outstanding.
Assistant headmaster of St Paul's senior school Peter Hampton says for the students to gain scholarship success, they need to be resilient and determined.
"The students need to demonstrate high-level critical thinking and apply their knowledge, understanding and ideas to complex situations.
"These are tough examinations," he says.
The four outstanding scholar award winners, who rank as the county's top 60 scholars are:
Belinda Pedersen - outstanding scholarship passes in calculus, chemistry, statistics; scholarship passes in physics, biology.
Sheng Cao - outstanding scholarship passes in calculus, chemistry, statistics; scholarship pass in physics.
Olivia Thompson - outstanding scholarship passes in science, chemistry, statistics.
Charlotte Dumble - outstanding scholarship passes in biology, chemistry; scholarship passes in calculus & statistics.
Each outstanding scholarship awardee receives $5000 annually for up to three years as long as they maintain a B average in tertiary study in New Zealand.