Transitional kindergarten · San Bruno

5 of San Bruno’s public and charter campuses ran a TK class in 2025–26, enrolling 161 four-year-olds.

Source: CDE 2025–26 October enrollment count, 5 campuses in San Bruno.

Portola Elementary: 39 in TKJohn Muir Elementary: 38 in TKAllen (Decima M.) Elementary: 37 in TKBelle Air Elementary: 25 in TKLomita Park Elementary: 22 in TK
  1. Portola Elementary39 in TK
  2. John Muir Elementary38 in TK
  3. Allen (Decima M.) Elementary37 in TK
  4. Belle Air Elementary25 in TK
  5. Lomita Park Elementary22 in TK
Each numbered dot is a campus with a TK class, where it stands in the city. 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 2 school districts

Campuses

Which San Bruno campuses have a TK class?

5 campuses in San Bruno had a TK class in 2025–26.

Campuses by TK headcount

  • 39in TK

    Portola Elementary

    Grades TK–5 · San Bruno Park Elementary

    Scope Score 83Strong · 82nd percentile

  • 38in TK

    John Muir Elementary

    Grades TK–5 · San Bruno Park Elementary

    Scope Score 85Strong · 86th percentile

  • 37in TK

    Allen (Decima M.) Elementary

    Grades TK–5 · San Bruno Park Elementary

    Scope Score 73Developing · 38th percentile

  • 25in TK

    Belle Air Elementary

    Grades TK–5 · San Bruno Park Elementary

    Scope Score 67Needs Support · 5th percentile

  • 22in TK

    Lomita Park Elementary

    Grades TK–5 · Millbrae Elementary

    Scope Score 71Needs Support · 23rd 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?

San Bruno has 33 licensed child care programs.

18

child care centers

15

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 San Bruno’s centers and family child care homes, and ask each one about ages and openings.

Preschools in San BrunoPre-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.