Transitional kindergarten · Ontario

25 of Ontario’s public and charter campuses ran a TK class in 2025–26, enrolling 973 four-year-olds.

Source: CDE 2025–26 October enrollment count, 25 campuses in Ontario.

Ranch View Elementary: 95 in TKPark View Elementary: 72 in TKCreek View Elementary: 48 in TKMountain View Elementary: 46 in TKEuclid Language Academy: 45 in TKSultana Elementary: 45 in TKEl Camino Elementary: 43 in TKOntario Center: 42 in TKRichard Haynes Elementary: 41 in TKLiberty Elementary: 40 in TKBerlyn Elementary: 39 in TKLevi H. Dickey Elementary: 39 in TKBon View Elementary: 34 in TKMariposa Elementary: 34 in TKDel Norte Elementary: 33 in TKHawthorne Elementary: 33 in TKLincoln Elementary: 33 in TKElderberry Elementary: 32 in TKMission Elementary: 32 in TKCorona Elementary: 31 in TKVista Grande Elementary: 31 in TKArroyo Elementary: 30 in TKVineyard Elementary: 24 in TKEdison Elementary: 23 in TKCentral Language Academy: 8 in TK
Each dot is a campus with a TK class. A larger dot has more children in TK. North is up.

Eligibility

Who can start TK in 2027–28?

Children who turn 4 by September 1, 2027 can start, and it’s free.

Age

Is my child old enough?

A birthday from September 2, 2022 through September 1, 2023 (our arithmetic from the rule). A child who turns 5 by September 1 starts kindergarten instead.

Rule: California Education Code § 48000 (opens in a new tab)

Cost

Does TK cost anything?

No. TK is a free public school year before kindergarten, and enrolling is optional. Hours, before- and after-school care and open seats vary by campus, so ask the school.

Starting ages and cutoff dates →

Where to enroll

Through 4 school districts

Campuses

Which Ontario campuses have a TK class?

25 campuses in Ontario had a TK class in 2025–26.

Campuses by ZIP code

917618 campuses · 419 in TK

  • 95in TK

    Ranch View Elementary

    Grades TK–6 · Mountain View Elementary

    Scope Score 76Solid · 55th percentile

  • 72in TK

    Park View Elementary

    Grades TK–6 · Mountain View Elementary

    Scope Score 93Strong · 97th percentile

  • 48in TK

    Creek View Elementary

    Grades TK–6 · Mountain View Elementary

    Scope Score 72Developing · 31st percentile

  • 46in TK

    Mountain View Elementary

    Grades TK–6 · Mountain View Elementary

    Scope Score 74Developing · 46th percentile

  • 45in TK

    Sultana Elementary

    Grades TK–6 · Ontario-Montclair

    Scope Score 76Solid · 55th percentile

  • 40in TK

    Liberty Elementary

    Grades TK–6 · Chino Valley Unified

    Scope Score 83Strong · 81st percentile

  • 39in TK

    Levi H. Dickey Elementary

    Grades TK–6 · Chino Valley Unified

    Scope Score 73Developing · 36th percentile

  • 34in TK

    Bon View Elementary

    Grades TK–6 · Ontario-Montclair

    Scope Score 76Solid · 53rd percentile

917627 campuses · 257 in TK
9176410 campuses · 297 in TK

  • 42in TK

    Ontario Center

    Grades TK–5 · Cucamonga Elementary

    Scope Score 75Developing · 48th percentile

  • 39in TK

    Berlyn Elementary

    Grades TK–6 · Ontario-Montclair

    Scope Score 73Developing · 38th percentile

  • 34in TK

    Mariposa Elementary

    Grades TK–6 · Ontario-Montclair

    Scope Score 74Developing · 42nd percentile

  • 33in TK

    Del Norte Elementary

    Grades TK–6 · Ontario-Montclair

    Scope Score 77Solid · 58th percentile

  • 33in TK

    Lincoln Elementary

    Grades TK–6 · Ontario-Montclair

    Scope Score 74Developing · 44th percentile

  • 31in TK

    Corona Elementary

    Grades TK–6 · Ontario-Montclair

    Scope Score 77Solid · 59th percentile

  • 30in TK

    Arroyo Elementary

    Grades TK–8 · Ontario-Montclair

    Scope Score 77Solid · 59th percentile

  • 24in TK

    Vineyard Elementary

    Grades TK–8 · Ontario-Montclair

    Scope Score 74Developing · 45th percentile

  • 23in TK

    Edison Elementary

    Grades TK–8 · Ontario-Montclair

    Scope Score 89Strong · 92nd percentile

  • 8in TK

    Central Language Academy

    Grades TK–8 · Ontario-Montclair

    Scope Score 77Solid · 59th percentile

Each campus’s TK headcount is from the state’s 2025–26 October enrollment count. Each Scope Score and percentile compares a school’s elementary grades with California elementary schools. A campus without elementary results shows none.

Each headcount counts the students enrolled on one October day, so it shows who enrolled, not seats open now. A campus missing here may still run TK; confirm with the school or district.

Before TK

Too young for TK? Where can my child go?

Ontario has 52 licensed child care programs.

27

child care centers

25

family child care homes

A child born after September 1, 2023 isn’t old enough for TK in 2027–28. Until they are, look at Ontario’s centers and family child care homes, and ask each one about ages and openings.

Preschools in OntarioPre-K vs TK vs preschool in California: a 2026 parent’s guide

Licensed programs from the California Community Care Licensing Division: child care centers as of August 13, 2026, family child care homes as of May 25, 2025. A license is not a quality rating or a current opening.