East Side Union High School District

It never has a ZIP Code to itself

At 1,167 homes to the square mile this is city territory, and district lines in a city follow streets. East Side Union High covers 139 square miles in all — small enough that a single ZIP Code area can hold most of it, and several ZIP Codes can cut across it.

• Homes inside the boundary162,675
• Residents547,260
• ZIP Code areas it reaches22
• Where it is the only district0
• Where it shares with another district21
• Where it holds under half a percent1
• Land area139 square miles
• Homes per square mile1,167

The ZIP Code areas it reaches

The spread is the thing to notice. In 95127 this district holds 100% of the homes; in 95120 it holds no homes at all. Same district, opposite answers, and a lookup that names it without the share tells the second household the same thing as the first.

• ZIP Code 95127 · San Jose, California100% of the homes
• ZIP Code 95111 · San Jose, California100% of the homes
• ZIP Code 95122 · San Jose, California100% of the homes
• ZIP Code 95148 · San Jose, California100% of the homes
• ZIP Code 95121 · San Jose, California100% of the homes
• ZIP Code 95131 · San Jose, California100% of the homes
• ZIP Code 95135 · San Jose, California100% of the homes
• ZIP Code 95132 · San Jose, California99% of the homes
• ZIP Code 95119 · San Jose, California97% of the homes
• ZIP Code 95133 · San Jose, California97% of the homes
• ZIP Code 95138 · San Jose, California91% of the homes
• ZIP Code 95123 · San Jose, California74% of the homes
• ZIP Code 95140 · Santa Clara County, California72% of the homes
• ZIP Code 95116 · San Jose, California68% of the homes
• ZIP Code 95136 · San Jose, California64% of the homes
• ZIP Code 95134 · San Jose, California20% of the homes
• ZIP Code 95013 · San Jose, California3 of 25 homes
• ZIP Code 95112 · San Jose, California12% of the homes
• ZIP Code 95125 · San Jose, California4.7% of the homes
• ZIP Code 95110 · San Jose, California4.1% of the homes
• ZIP Code 95035 · Milpitas, California3.8% of the homes
• ZIP Code 95120 · San Jose, Californiano homes at all

What one name misses, and what changes later

East Side Union High is the largest district in 14 ZIP Code areas. Answer with its name alone and the answer misses 17,982 of the 172,755 homes those areas hold — though in 5 of them it holds every home there is. The count is homes, not addresses, and it is the number no lookup prints.

ZIP Code 95123 · San Jose, California is a two-district area: 18,494 of its 24,996 homes are inside East Side Union High, and the other 6,502 homes are with San Jose Unified. Which one an address belongs to is settled by the street, not by the five digits.

In ZIP Code 95136 · San Jose, California the split runs 10,504 to 5,947 and the larger part is East Side Union High's: the rest is 5,947 homes with San Jose Unified.

East Side Union High holds 3,209 of the 3,292 homes in ZIP Code 95119 · San Jose, California, so its name is right for most of the area and wrong for the rest: 83 homes with Morgan Hill Unified.

In ZIP Code 95131 · San Jose, California the split runs 9,968 to 2 and the larger part is East Side Union High's: the rest is 2 homes in districts too small to name here.

In ZIP Code 95111 · San Jose, California the single-name answer is the true one: East Side Union High holds all 16,567 homes counted there, and no other district holds a share worth naming.

In ZIP Code 95112 · San Jose, California this district is one name among 4. San Jose Unified leads with the largest share and East Side Union High holds 2,758 of the 23,330 homes counted there; no single name describes that area at all.

East Side Union High reaches into ZIP Code 95134 · San Jose, California with 2,754 of its 14,100 homes; 3 districts there hold a real share of it, and Santa Clara Unified leads them. The familiar answer for that area is one of the others, and it is wrong for those 2,754 homes.

East Side Union High is not the name anyone would give for ZIP Code 95125 · San Jose, California — San Jose Unified leads it — and East Side Union High holds 1,007 homes there all the same. Answer that area with one name and that is what it is wrong about.

The elementary districts that feed it

Students arrive at East Side Union High from 6 districts that run the lower grades on the same ground — Oak Grove Elementary, which sends 18%, Evergreen Elementary, which sends 17% and Alum Rock Union Elementary, which sends 17%. Each of those addresses therefore belongs to two districts at once, one for grade school and this one for high school, and neither name is the whole answer.

• Oak Grove Elementary School District18% of East Side Union High's homes come from here
• Evergreen Elementary School District17% of East Side Union High's homes come from here
• Alum Rock Union Elementary School District17% of East Side Union High's homes come from here
• Berryessa Union Elementary School District15% of East Side Union High's homes come from here
• Franklin-McKinley Elementary School District14% of East Side Union High's homes come from here
• San Jose Unified School District9.5% of East Side Union High's homes come from here

The names in this list are exact: the federal file gives the district of each band for every census block. The percentages are not. They spread each shared ZIP Code area's homes across the other band in proportion to the share each district holds there, because the file names the two districts of a block and not how a household moves between them. Read them as the size of the crossing, not as a count of houses.

Who it shares ZIP Codes with

East Side Union High shares ZIP Code areas with 14 different districts. The most frequent are Franklin-McKinley Elementary, San Jose Unified, Alum Rock Union Elementary and Oak Grove Elementary. In a neighborhood this crowded the question is not which district serves the ZIP Code but which side of which street an address is on.

• Franklin-McKinley Elementary School District7 shared ZIP areas
• San Jose Unified School District7 shared ZIP areas
• Alum Rock Union Elementary School District6 shared ZIP areas
• Oak Grove Elementary School District6 shared ZIP areas
• Berryessa Union Elementary School District5 shared ZIP areas
• Evergreen Elementary School District5 shared ZIP areas

Where this district sits

• School districts in California996 of 1,788 ZIP areas split
• Every district with a page here260 districts listed

What to do next

Ask the district office to confirm your street address. A district settles that question on its own site: look for a school locator, a find my school tool, or an attendance zone map. Where there is none, ask the office itself.

A ZIP Code is a set of mail delivery routes, not a boundary: in 21 of the 22 ZIP Code areas East Side Union High reaches, at least one other district holds a real share of the homes as well, and the line between them runs along streets. Only the district can say which side of that line an address is on.

This site links to no district website. None of the federal files it is built from publishes one, and a guessed address is worse than none. It is the district office, not a search engine, that settles an address.

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.

What this cannot tell you

The homes were counted in the 2020 Census and the district lines are the 2026 boundary file. Nothing on this page adjusts one to the other. Where houses have been built or cleared since the count, a share here describes the place as it was counted rather than as it stands today, and in the fastest-growing ZIP Code areas that gap is the largest single source of error on this site.

A share on this page is a share of the homes in the ZIP Code area, not a probability for any particular address. Enrollment is decided by street address, and a district may run magnet, charter or choice programs that ignore the boundary entirely. If a decision depends on the answer, the district office is the only authority; this page shows what the federal boundary files say and when they were published.

A district boundary is not a school attendance zone. This site never says which school an address is assigned to: no current national dataset of attendance zones exists, and the district draws them itself. Nor is anything here endorsed or certified by the Census Bureau; we use their published files, and that is the whole of the relationship.

A ZIP Code is a set of mail delivery routes, not an area. What is mapped here is the Census Bureau's ZIP Code Tabulation Area, the closest published approximation to it. The two are not identical, and a handful of ZIP Codes used only for post office boxes or single buildings have no tabulation area at all.

Where these numbers come from

School district boundaries come from the Census Bureau's Census Geographic Relationship File, current 2026 vintage, which assigns every census block to a unified district or to an elementary and a secondary district. Homes and residents in each block come from the 2020 Census Redistricting Data (PL 94-171), H1_001 and P1_001. The ZIP Code areas come from the same Geographic Relationship File, block to ZIP Code Tabulation Area. District names and grade ranges come from the Census Gazetteer 2025, with 2020 for districts no longer listed.

The place name printed beside a ZIP Code comes from the Census 2020 ZIP Code Tabulation Area relationship files: place, county subdivision and county, taken 2026-09-06. It is a label rather than a measurement: the Census Bureau does not publish which post office a ZIP Code belongs to, so the place named is the one covering the most land inside the area, not the city the Postal Service prints on an envelope.

Everything else on this page — the shares, the counts of districts per ZIP, the comparison between the two grade bands, the rankings — is computed here from those files. The source publishes none of it. Snapshot taken 2026-09-03.