The fleet-footed, tough-tackling athlete, who also plays for the Sale Sharks Academy, joins a glittering array of talent, all earning representative honours at the top level.
In the last six years, five King's School star players have either donned the English red rose or been selected for leading premiership teams, with professional careers looming.
Head of King's Rugby Giles Hetherington said: "Toby epitomises the King’s blue print. He loves to carry the ball, has mastered the midfield battle both offensively and defensively and has been a huge part of why the First XV have won so many games this season.
"He fully deserves this prestigious national selection and joins our captain and number 8 Haydn Keogh on the honours list, with Haydn, also a Macclesfield lad, earning Cheshire and North of England caps."
In recent years, open side flanker Ollie Leatherbarrow, originally from Knutsford, who was in the team of 2018, has earned a professional contract with the toast of the North The Newcastle Falcons.
Talented fly-half Ollie Davies from Macclesfield, who was in last year's team, has been selected for England under 18s and the Sale Sharks Academy, while second row Sam Higginson, originally from Wilmslow, and in the side of 2017 has won selection for England Universities.
Toby's and Haydn's success follows a superb season for King's with the First Team winning 13 of their 15 competitive fixtures and the sevens side appearing in the Vase Final of the world famous Rosslyn Park Sevens, where 250 schools take part, only to meet their match in Rugby School.
Giles added: "King’s continues to go from strength-to-strength. The most significant change to the fixtures ever has been put in place for next season as we will now travel across the country to search out the country's top sides and ensure our huge wealth of talent is appropriately tested."
Giles concluded: "Overall, King's won 70% matches across 12 teams. Our junior section from under 12s to under 15s , lost just seven of their 60 matches which means the future continues to look incredibly bright. With a record number of Sale Sharks Development Player Programme players, Sharks Academy players, county and now national talent, King’s more than ever is recognised as a school of huge rugby prowess."
This year, King’s achieved its highest ever ranking in a national league table for sport. The School Sport Magazine tables saw King’s feature in the Top 25 schools across the UK for achievements across all sporting disciplines. The ranking includes both independent and state schools and is based on performance in national competitions in all sports.
CAPTION - Pictured from left to right in a montage of the King's stars are Ollie Leatherbarrow, Ollie Davis, Toby Wilson, Haydn Keogh and Sam Higginson.