Transitional kindergarten · Sonoma

4 of Sonoma’s public and charter campuses ran a TK class in 2025–26, enrolling 79 four-year-olds.

Source: CDE 2025–26 October enrollment count, 4 campuses in Sonoma.

El Verano Elementary: 20 in TKFlowery Elementary: 20 in TKSassarini Elementary: 20 in TKSonoma Charter: 19 in TK
  1. El Verano Elementary20 in TK
  2. Flowery Elementary20 in TK
  3. Sassarini Elementary20 in TK
  4. Sonoma Charter19 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 Sonoma Valley Unified, or a charter

Campuses

Which Sonoma campuses have a TK class?

4 campuses in Sonoma had a TK class in 2025–26.

Campuses by TK headcount

  • 20in TK

    El Verano Elementary

    Grades TK–5 · Sonoma Valley Unified

    Scope Score 71Developing · 27th percentile

  • 20in TK

    Flowery Elementary

    Grades TK–5 · Sonoma Valley Unified

    Scope Score 70Needs Support · 20th percentile

  • 20in TK

    Sassarini Elementary

    Grades TK–5 · Sonoma Valley Unified

    Scope Score 68Needs Support · 10th percentile

  • 19in TK

    Sonoma CharterCharter

    Grades TK–8 · Sonoma Valley Unified · Check how it admits students.

    Scope Score 73Developing · 40th 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?

Sonoma has 16 licensed child care programs.

12

child care centers

4

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

Preschools in SonomaPre-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.