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Youth programs in Billerica 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.
Billerica is in Middlesex, with a 2020 census population of 42,119.
Billerica runs a local school district.
Billerica Memorial High School's teams wear Green and white and compete in the Merrimack Valley Conference (MIAA).
This guide lists 108 programs from 28 organizations. 52 of them publish either an exact fee or a free claim; 1 is free.
Billerica runs a local school district.
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 108 listings there are 22 different registration sites, which is the thing worth knowing before you start: there is no single front door.
108 listings come from 28 separate organizations, and no one of them runs more than a fraction of it. The four biggest are Billerica Recreation Department (56), Billerica Public Library (6), Boys & Girls Clubs of Greater Billerica (6), Billerica Hockey Association (BHA) (5).
How the listings split: 46 sport, 24 camps or clinics, and 38 arts, STEM, after-school and life-skills classes.

11 schemes a Billerica 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.