Trinity Area School District

It never has a ZIP Code to itself

The counts below come from the census blocks assigned to Trinity Area, grouped by the ZIP Code area each block falls in. The Census Bureau publishes the blocks; the grouping is computed here, and it is the only place these particular numbers exist.

• Homes inside the boundary11,900
• Residents25,803
• ZIP Code areas it reaches4
• Where it is the only district0
• Where it shares with another district4
• Where it holds under half a percent0
• Land area90 square miles
• Homes per square mile132

The ZIP Code areas it reaches

Every one of the 4 areas where it holds a real share it shares with somebody. Its largest foothold is 15311 at 80% of the homes; the thinnest is 15330, where it holds 1.3% of the homes.

• ZIP Code 15311 · Amwell, Pennsylvania80% of the homes
• ZIP Code 15301 · Washington, Pennsylvania49% of the homes
• ZIP Code 15345 · Marianna, Pennsylvania3.8% of the homes
• ZIP Code 15330 · Eighty Four, Pennsylvania1.3% of the homes

The areas it leads without holding most of the homes

Trinity Area is the largest district in 2 ZIP Code areas, and not one of them is wholly its own. Answer with its name alone and the answer misses 11,850 of the 23,690 homes those areas hold. That count is computed here from census blocks; the lookups that answer this question with a single name never print it.

Trinity Area is the largest name in ZIP Code 15301 · Washington, Pennsylvania and still holds a minority of it: 11,392 of 23,129 homes. The other 11,737 homes are 11,569 with Washington, McGuffey, Chartiers-Houston and 2 more districts; 168 in districts too small to name here. This is the shape that makes a one-name answer worst — the name is right for fewer homes than it is wrong for.

Trinity Area is one of 4 districts the file names for ZIP Code 15311 · Amwell, Pennsylvania at that level. It holds 448 of the 561 homes there; the rest is 113 homes with Bethlehem-Center, McGuffey and Bentworth. One name for that area is not a simplification, it is a different answer for 113 of the homes in it.

Trinity Area is not the name anyone would give for ZIP Code 15330 · Eighty Four, Pennsylvania — Ringgold leads it — and Trinity Area holds 30 homes there all the same. Answer that area with one name and that is what it is wrong about.

ZIP Code 15345 · Marianna, Pennsylvania is another area where Trinity Area is present without being the answer: 30 of its 785 homes, behind Bethlehem-Center.

Who takes the other homes in its ZIP Codes

Trinity Area 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 — Washington, McGuffey and Chartiers-Houston. They are neighbors on the same postal ground, not the next stop for its own students.

• Washington School District7,538 homes in 1 shared ZIP Code area
• McGuffey School District1,926 homes in 2 shared ZIP Code areas
• Chartiers-Houston School District1,352 homes in 1 shared ZIP Code area
• Canon-McMillan School District1,199 homes in 2 shared ZIP Code areas
• Ringgold School District972 homes in 1 shared ZIP Code area
• Bethlehem-Center School District847 homes in 2 shared ZIP Code areas

Who it shares ZIP Codes with

Trinity Area shares ZIP Code areas with 9 different districts. The most frequent are Bentworth, Bethlehem-Center, Canon-McMillan and McGuffey. 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.

• Bentworth School District2 shared ZIP areas
• Bethlehem-Center School District2 shared ZIP areas
• Canon-McMillan School District2 shared ZIP areas
• McGuffey School District2 shared ZIP areas
• Avella Area School District1 shared ZIP area
• Chartiers-Houston School District1 shared ZIP area

Where this district sits

• School districts in Pennsylvania868 of 1,826 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 4 ZIP Code areas Trinity Area 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.