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ZIP Code 94561 · Oakley, California

Contra Costa County · 13,954 counted · 3 districts

Grade schoolOakley Union Elementary School District84%11,719 of 13,954 homes
High schoolLiberty Union High School District84%11,785 of 13,954 homes

Each percentage here is a share of the 13,954 homes counted in ZIP Code 94561, not the chance that any one address is in that district. Enrollment follows the street: two houses on opposite sides of the same road can be in different districts, and only the district office can say which.

The districts named for the early grades in ZIP Code 94561, Oakley, California are not the districts named for high school, and the set changes in both directions: 1 district arrives for high school only, 1 runs the early grades and stops, and 1 serves both bands. 3 districts hold the 13,954 homes counted here between them, and Liberty Union High is the largest by homes. The largest share leaves 2,169 homes elsewhere: 2,169 homes with Antioch Unified. Districts holding under half a percent of the homes named at their own level are listed separately below and are not counted in that number.

The early grades are split between two districts

2 districts hold a measurable share of ZIP Code 94561 at this level. Oakley Union Elementary is the largest with 11,719 homes; the smallest of them holds 2,169 homes. Oakley Union Elementary is named here for grade school and not for high school.

Every track below is 35 cells long and stands for all 13,954 homes counted in ZIP Code 94561, so one cell is 399 homes, rounded to the nearest whole cell. Cells lit solid are the homes one district holds, and the unlit cells are the homes held by the other districts in the same list.

  • Oakley Union Elementary School District11,719 of 13,954 homes84%
  • Antioch Unified School District2,169 of 13,954 homes16%

Below half a percent at the grade school level: Knightsen Elementary School District and Brentwood Union Elementary School District hold 66 homes between them, which is why they are counted under the list rather than inside it. A lookup that named them alongside the districts above would be listing a boundary crossing rather than an answer.

High school is split between two districts

2 districts hold a measurable share of ZIP Code 94561 at this level. Liberty Union High is the largest with 11,785 homes; the smallest of them holds 2,169 homes. Liberty Union High is named here for high school and not for the early grades.

  • Liberty Union High School District11,785 of 13,954 homes84%
  • Antioch Unified School District2,169 of 13,954 homes16%

Have a street address?

A ZIP Code names every district that can serve the area; a street address settles which one serves a home. The Census Bureau geocoder takes an exact address and returns its school districts from the current boundary files, free and with no account.

Check an exact address with the Census Geocoder

Then confirm it with the district office. Each district named here, with its NCES district ID, website and phone:

The set of names changes in both directions

Liberty Union High is named for high school here and for no elementary grades, and Oakley Union Elementary runs the early grades and no more. An address on the wrong street can therefore change district at the change of grade and land in a district that was never part of its elementary answer, while a neighbor two blocks away keeps one name the whole way through.

What one district name costs in 94561

A lookup that answers ZIP Code 94561 with one district name has to pick one of the names below and drop the rest. Measured against the 13,954 homes counted here, for the early grades it is wrong for 2,235 homes and for high school it is wrong for 2,169 homes. That is the whole difference between this page and a one-line answer: the same federal file, read to the end instead of to the first row.

The districts that reach into 94561

The districts named above are not alike in size or in reach. Liberty Union High touches 10 ZIP Code areas in all and holds 11,785 homes inside this one; Oakley Union Elementary touches 4 areas. Antioch Unified is the only district in at least one ZIP Code area somewhere in the country, while Liberty Union High is never the only one anywhere: every postal area it touches, it shares.

  • Liberty Union High School District11,785 of 13,954 here · 10 ZIP areas in all
  • Oakley Union Elementary School District11,719 of 13,954 here · 4 ZIP areas in all
  • Antioch Unified School District2,169 of 13,954 here · 5 ZIP areas in all

Where Oakley Union Elementary goes from here

Oakley Union Elementary School District runs kindergarten through grade 8, and it shares 2 of the 4 ZIP Code areas it touches with neighbors, holds under half a percent of the homes in the remaining 2, and is the only district in none of them. Inside its own boundary it holds 12,968 homes over 39 square miles; the part of it counted in ZIP Code 94561 is 11,719 of those. The district it shares the most postal ground with is Liberty Union High School District, across 2 ZIP Code areas.

How 94561 compares in California

Across California the boundary file names more than one district in 996 of the 1,788 ZIP Code areas it names a district for, 56% of them, and 3 areas in the state have no high school district named for part of their homes. Counting the districts named at either level, 299 areas in California name more than this ZIP Code does and 1,208 name fewer. Nationally more than one district is named in 53% of 33,555 areas.

Look up 94561 again, or look up another ZIP Code

The lookup holds every ZIP Code area in the country with homes in it, including the ones with no page of their own. Opening it at 94561 recomputes the same 13,954 homes from the same snapshot, and typing five other digits answers for somewhere else. No server is asked for the answer: the whole index travels with the lookup page itself.

What to do next

Ask the district office to confirm your street address: look on its site for a school locator, a find my school tool or an attendance zone map, or call the office.

A ZIP Code is a set of mail delivery routes, not a boundary: 2,169 of the 13,954 homes counted in 94561 sit outside the district holding the most of them, and the line between the two runs along streets rather than around the postal area.

District websites and phone numbers here come from the NCES Common Core of Data directory, 2024-25 school year, filed under the same district ID as the Census boundary files. Where it lists no usable website, none is printed rather than guessed.

What this site can hand you instead:

If a house purchase depends on the answer, ask the district itself for written confirmation of that exact address. A listing is not a district record, and neither is this page.

Where these numbers come from

The homes were counted in the 2020 Census and the district lines are the 2026 boundary file, so a fast-growing area may have changed since; ZIP Codes here are the Census Bureau's ZIP Code Tabulation Areas; a share is a share of homes, not the chance that one address is in a district; and a district is not a school attendance zone. Every source, file and caveat is on the method page.