DistrictByZip Every school district that touches your ZIP Code

ZIP Code 93257 · Porterville, California

Tulare County · 23,949 counted · 9 districts

Grade schoolPorterville Unified School District67%16,057 of 23,949 homes
High schoolPorterville Unified School District67%16,057 of 23,949 homes

Each percentage here is a share of the 23,949 homes counted in ZIP Code 93257, 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 93257, Porterville, California are not the districts named for high school, and the set changes in both directions: 1 district arrives for high school only, 7 run the early grades and stop, and 1 serves both bands. 9 districts hold the 23,949 homes counted here between them, and Porterville Unified School District is the largest by homes. The largest share leaves 7,892 homes elsewhere: 7,698 homes with Burton Elementary, Alta Vista Elementary, Rockford Elementary and 4 more districts; 194 homes in districts too small to name here.

The early grades are divided many ways

8 districts hold a measurable share of ZIP Code 93257 at this level. Porterville Unified School District is the largest with 16,057 homes; the smallest of them holds 152 homes. Burton Elementary, Alta Vista Elementary, Rockford Elementary and 4 more districts are named here for grade school and not for high school.

Every track below is 35 cells long and stands for all 23,949 homes counted in ZIP Code 93257, so one cell is 684 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.

  • Porterville Unified School District16,057 of 23,949 homes67%
  • Burton Elementary School District5,684 of 23,949 homes24%
  • Alta Vista Elementary School District805 of 23,949 homes3.4%
  • Rockford Elementary School District303 of 23,949 homes1.3%
  • Hope Elementary School District282 of 23,949 homes1.2%
  • Woodville Elementary School District260 of 23,949 homes1.1%
  • Pleasant View Elementary School District212 of 23,949 homes0.9%
  • Strathmore Union Elementary School District152 of 23,949 homes0.6%

Below half a percent at the grade school level: Sunnyside Union Elementary School District, Ducor Union Elementary School District and Terra Bella Union Elementary School District, and 3 more hold 194 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 93257 at this level. Porterville Unified School District is the largest with 16,057 homes; the smallest of them holds 7,892 homes. Porterville Unified School District (9-12) is named here for high school and not for the early grades.

  • Porterville Unified School District16,057 of 23,949 homes67%
  • Porterville Unified School District (9-12)7,892 of 23,949 homes33%

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

Porterville Unified School District (9-12) is named for high school here and for no elementary grades, and Burton Elementary, Alta Vista Elementary, Rockford Elementary and 4 more districts run 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 93257

A lookup that answers ZIP Code 93257 with one district name has to pick one of the names below and drop the rest. Measured against the 23,949 homes counted here, for the early grades it is wrong for 7,892 homes and for high school it is wrong for 7,892 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 93257

The districts named above are not alike in size or in reach. Porterville Unified School District (9-12) touches 19 ZIP Code areas in all and holds 7,892 homes inside this one; Burton Elementary touches 1 area. Not one of them is ever the only district in a ZIP Code area anywhere in the country: every postal area they touch, they share with somebody.

  • Porterville Unified School District16,057 of 23,949 here · 5 ZIP areas in all
  • Porterville Unified School District (9-12)7,892 of 23,949 here · 19 ZIP areas in all
  • Burton Elementary School District5,684 of 23,949 here · 1 ZIP area in all
  • Alta Vista Elementary School District805 of 23,949 here · 1 ZIP area in all
  • Rockford Elementary School District303 of 23,949 here · 2 ZIP areas in all
  • Hope Elementary School District282 of 23,949 here · 1 ZIP area in all
  • Woodville Elementary School District260 of 23,949 here · 4 ZIP areas in all
  • Pleasant View Elementary School District212 of 23,949 here · 3 ZIP areas in all
  • Strathmore Union Elementary School District152 of 23,949 here · 4 ZIP areas in all

Where Porterville Unified School District goes from here

Porterville Unified School District runs kindergarten through grade 12, and it shares 2 of the 5 ZIP Code areas it touches with neighbors, holds under half a percent of the homes in the remaining 3, and is the only district in none of them. Inside its own boundary it holds 16,217 homes over 322 square miles; the part of it counted in ZIP Code 93257 is 16,057 of those. The district it shares the most postal ground with is Alta Vista Elementary School District, across 1 ZIP Code area. Its thinnest measured foothold is elsewhere: in ZIP Code area 93527 it holds 156 of 1,262 homes, or 12% of them.

How 93257 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, 5 areas in California name more than this ZIP Code does and 1,779 name fewer. Nationally more than one district is named in 53% of 33,555 areas.

Look up 93257 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 93257 recomputes the same 23,949 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: 7,892 of the 23,949 homes counted in 93257 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.