San Bernardino City Unified School District

Where this district is the answer, and where it is not

273,684 residents live in 80,251 homes here, about 3.4 people to a home, which is a fact about the housing inside this boundary rather than about the schools. The share figures below count homes, so a district of large households carries more people than its share of the homes suggests.

• Homes inside the boundary80,251
• Residents273,684
• ZIP Code areas it reaches17
• Where it is the only district4
• Where it shares with another district4
• Where it holds under half a percent9
• Land area158 square miles
• Homes per square mile509

The ZIP Code areas it reaches

The spread is the thing to notice. In 92404 this district holds 100% of the homes; in 92415 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 92404 · San Bernardino, California100% of the homes
• ZIP Code 92405 · San Bernardino, California100% of the homes
• ZIP Code 92401 · San Bernardino, California100% of the homes
• ZIP Code 92411 · San Bernardino, California100% of the homes
• ZIP Code 92407 · San Bernardino, California96% of the homes
• ZIP Code 92410 · San Bernardino, California71% of the homes
• ZIP Code 92346 · Highland, California67% of the homes
• ZIP Code 92408 · San Bernardino, California45% of the homes
• ZIP Code 92324 · Colton, California61 homes, under half a percent
• ZIP Code 92371 · Phelan, California2 homes, under half a percent
• ZIP Code 92345 · Hesperia, Californiano homes at all
• ZIP Code 92358 · Lytle Creek, Californiano homes at all
• ZIP Code 92369 · San Bernardino, Californiano homes at all
• ZIP Code 92374 · Redlands, Californiano homes at all
• ZIP Code 92382 · Running Springs, Californiano homes at all
• ZIP Code 92385 · Lake Arrowhead, Californiano homes at all
• ZIP Code 92415 · San Bernardino, Californiano homes at all

The areas it leads without holding most of the homes

San Bernardino City Unified is the largest district in 8 ZIP Code areas. Answer with its name alone and the answer misses 13,348 of the 93,536 homes those areas hold — though in 3 of them it holds every home there is. The count is homes, not addresses, and it is the number no lookup prints.

ZIP Code 92346 · Highland, California is a two-district area: 12,492 of its 18,563 homes are inside San Bernardino City Unified, and the other 6,071 homes are with Redlands Unified. Which one an address belongs to is settled by the street, not by the five digits.

San Bernardino City Unified holds 10,222 of the 14,477 homes in ZIP Code 92410 · San Bernardino, California, so its name is right for most of the area and wrong for the rest: 4,253 homes with Rialto Unified and 2 homes in a district too small to name here.

San Bernardino City Unified is the largest name in ZIP Code 92408 · San Bernardino, California and still holds a minority of it: 1,884 of 4,201 homes. The other 2,317 homes are with Colton Joint Unified and Redlands Unified. This is the shape that makes a one-name answer worst — the name is right for fewer homes than it is wrong for.

In ZIP Code 92407 · San Bernardino, California the split runs 18,607 to 704 and the larger part is San Bernardino City Unified's: the rest is 614 homes with Rialto Unified and 90 homes in districts too small to name here.

In ZIP Code 92411 · San Bernardino, California the split runs 7,105 to 1 and the larger part is San Bernardino City Unified's: the rest is 1 home in a district too small to name here.

Who takes the other homes in its ZIP Codes

San Bernardino City Unified runs kindergarten through grade 12 itself, so an address it holds sees no change of authority between grade school and high school. The districts listed below are the ones that take the other homes in the ZIP Code areas it shares — Hesperia Unified, Redlands Unified and Colton Joint Unified. They are neighbors on the same postal ground, not the next stop for its own students.

• Hesperia Unified School District26,985 homes in 1 shared ZIP Code area
• Redlands Unified School District22,151 homes in 3 shared ZIP Code areas
• Colton Joint Unified School District16,954 homes in 2 shared ZIP Code areas
• Rialto Unified School District7,584 homes in 4 shared ZIP Code areas
• Snowline Joint Unified School District5,639 homes in 2 shared ZIP Code areas
• Rim of the World Unified School District4,246 homes in 2 shared ZIP Code areas

Who it shares ZIP Codes with

These districts appear alongside San Bernardino City Unified in the same ZIP Code areas: Redlands Unified, Rialto Unified and Colton Joint Unified. A single-name lookup for one of those areas has to choose between them, and the choice is right for some addresses and wrong for others.

• Redlands Unified School District2 shared ZIP areas
• Rialto Unified School District2 shared ZIP areas
• Colton Joint Unified School District1 shared ZIP area

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 4 of the 17 ZIP Code areas San Bernardino City Unified 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.