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Youth programs in Medfield are run by several separate organizations — the municipality, the school district, independent volunteer clubs and private studios. Here is what is actually here, who runs it, and where you register.
Medfield is in Norfolk County, with a 2020 census population of 12,799.
Medfield Public Schools.
The high school teams are the Warriors, in Blue, White, Carolina blue, competing in the Tri-Valley League (TVL, MIAA).
This guide lists 104 programs from 36 organizations. 38 of them publish either an exact fee or a free claim; 11 are free.
Medfield Public Schools.
Names, grade spans and enrollments are the National Center for Education Statistics' Common Core of Data for 2024–25. A school run by another district is marked, because that is the one a family has to apply to separately.

These are the four organizations running the most programs in this guide, with the site each one registers on. Across all 104 listings there are 27 different registration sites, which is the thing worth knowing before you start: there is no single front door.
104 listings come from 36 separate organizations, and no one of them runs more than a fraction of it. The four biggest are Medfield Park & Recreation (23), Medfield Public Schools Athletics (Medfield High School Warriors) (17), Medfield Public Library (7), Medfield Youth Baseball and Softball (6).
How the listings split: 50 sport, 19 camps or clinics, and 35 arts, STEM, after-school and life-skills classes.

7 schemes a Medfield family can actually apply to, each one listed with what it covers, who qualifies and the page that states its own rules. Where a listing itself offers aid, its card carries an Aid available badge and the provider's own words.
Where the research found nothing, this guide leaves the gap visible rather than filling it.
No listing here claims an open place. Where a provider publishes a term but no dates, the card says the dates are not published rather than assuming last year's repeat.