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ZIP Code 85018 · Phoenix, Arizona

Maricopa County · 19,872 counted · 5 districts

Grade schoolScottsdale Unified District49%9,817 of 19,872 homes
High schoolPhoenix Union High School District51%10,055 of 19,872 homes

Each percentage here is a share of the 19,872 homes counted in ZIP Code 85018, 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 85018, Phoenix, Arizona are not the districts named for high school, and the set changes in both directions: 1 district arrives for high school only, 3 run the early grades and stop, and 1 serves both bands. 5 districts hold the 19,872 homes counted here between them, and Phoenix Union High is the largest by homes. The largest share leaves 9,817 homes elsewhere: 9,817 homes with Scottsdale 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 divided four ways

4 districts hold a measurable share of ZIP Code 85018 at this level. Scottsdale Unified is the largest with 9,817 homes; the smallest of them holds 354 homes. Creighton Elementary, Balsz Elementary and Madison Elementary are named here for grade school and not for high school.

Every track below is 35 cells long and stands for all 19,872 homes counted in ZIP Code 85018, so one cell is 568 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.

  • Scottsdale Unified District9,817 of 19,872 homes49%
  • Creighton Elementary District8,667 of 19,872 homes44%
  • Balsz Elementary District1,034 of 19,872 homes5.2%
  • Madison Elementary District354 of 19,872 homes1.8%

Paradise Valley Unified District reaches into ZIP Code 85018 at the grade school level and holds no home counted in it: the boundary crosses the postal area without picking up a single one.

High school is split between two districts

2 districts hold a measurable share of ZIP Code 85018 at this level. Phoenix Union High is the largest with 10,055 homes; the smallest of them holds 9,817 homes. Phoenix Union High is named here for high school and not for the early grades.

  • Phoenix Union High School District10,055 of 19,872 homes51%
  • Scottsdale Unified District9,817 of 19,872 homes49%

Paradise Valley Unified District reaches into ZIP Code 85018 at the high school level and holds no home counted in it: the boundary crosses the postal area without picking up a single one.

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:

  • Phoenix Union High School District NCES ID 0406330 phoenixunion.org (602) 764-0860
  • Scottsdale Unified District NCES ID 0407570 susd.org (480) 484-6100
  • Creighton Elementary District NCES ID 0402430 creightonschools.org (602) 381-6000
  • Balsz Elementary District NCES ID 0401050 balsz.org (602) 629-6400
  • Madison Elementary District NCES ID 0404500 madisonaz.org (602) 664-7900

The set of names changes in both directions

Phoenix Union High is named for high school here and for no elementary grades, and Creighton Elementary, Balsz Elementary and Madison Elementary 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 85018

A lookup that answers ZIP Code 85018 with one district name has to pick one of the names below and drop the rest. Measured against the 19,872 homes counted here, for the early grades it is wrong for 10,055 homes and for high school it is wrong for 9,817 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 85018

The districts named above are not alike in size or in reach. Phoenix Union High touches 31 ZIP Code areas in all and holds 10,055 homes inside this one; Creighton Elementary touches 5 areas. Scottsdale Unified is the only district in at least one ZIP Code area somewhere in the country, while Phoenix Union High is never the only one anywhere: every postal area it touches, it shares. 1 of them has a page here listing every ZIP Code area it reaches.

Where Scottsdale Unified goes from here

Scottsdale Unified District runs pre-K through grade 12, and it is the only school district serving 2 of the 14 ZIP Code areas it touches, shares 11 more with neighbors, and holds under half a percent of the homes in the remaining 1. Inside its own boundary it holds 129,137 homes over 111 square miles; the part of it counted in ZIP Code 85018 is 9,817 of those. The district it shares the most postal ground with is Paradise Valley Unified District, across 5 ZIP Code areas. Its thinnest measured foothold is elsewhere: in ZIP Code area 85032 it holds 626 of 29,972 homes, or 2.1% of them.

How 85018 compares in Arizona

Across Arizona the boundary file names more than one district in 259 of the 409 ZIP Code areas it names a district for, 63% of them, and 72 areas in the state have no high school district named for part of their homes. Counting the districts named at either level, 6 areas in Arizona name more than this ZIP Code does and 386 name fewer. Nationally more than one district is named in 53% of 33,555 areas.

Look up 85018 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 85018 recomputes the same 19,872 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: 9,817 of the 19,872 homes counted in 85018 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.