Valley View Community Unit School District 365U

It never has a ZIP Code to itself

The counts below come from the census blocks assigned to Valley View Community Unit School District 365U, 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 boundary31,067
• Residents89,847
• ZIP Code areas it reaches8
• Where it is the only district0
• Where it shares with another district5
• Where it holds under half a percent3
• Land area38 square miles
• Homes per square mile812

The ZIP Code areas it reaches

The spread is the thing to notice. In 60440 this district holds 95% of the homes; in 60441 it holds 4 homes, under half a percent. 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 60440 · Bolingbrook, Illinois95% of the homes
• ZIP Code 60446 · Romeoville, Illinois64% of the homes
• ZIP Code 60490 · Bolingbrook, Illinois45% of the homes
• ZIP Code 60544 · Plainfield, Illinois21% of the homes
• ZIP Code 60439 · Lemont, Illinois0.6% of the homes
• ZIP Code 60565 · Naperville, Illinois19 homes, under half a percent
• ZIP Code 60517 · Woodridge, Illinois12 homes, under half a percent
• ZIP Code 60441 · Lockport, Illinois4 homes, under half a percent

The areas it leads without holding most of the homes

Valley View Community Unit School District 365U is the largest district in 3 ZIP Code areas, and not one of them is wholly its own. Answer with its name alone and the answer misses 9,433 of the 38,251 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.

Valley View Community Unit School District 365U holds 8,809 of the 13,842 homes in ZIP Code 60446 · Romeoville, Illinois, so its name is right for most of the area and wrong for the rest: 5,033 homes with Plainfield School District 202 and Richland School District 88A.

Valley View Community Unit School District 365U is the largest name in ZIP Code 60490 · Bolingbrook, Illinois and still holds a minority of it: 2,969 of 6,543 homes. The other 3,574 homes are with Plainfield School District 202 and Indian Prairie Community Unit School District 204. 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 60440 · Bolingbrook, Illinois the split runs 17,040 to 826 and the larger part is Valley View Community Unit School District 365U's: the rest is 826 homes with Woodridge School District 68 and Naperville Community Unit District 203.

Valley View Community Unit School District 365U reaches into ZIP Code 60544 · Plainfield, Illinois with 2,163 of its 10,305 homes; 3 districts there hold a real share of it, and Plainfield School District 202 leads them. The familiar answer for that area is one of the others, and it is wrong for those 2,163 homes.

Valley View Community Unit School District 365U is not the name anyone would give for ZIP Code 60439 · Lemont, Illinois — Lemont Township High School District 210 leads it — and Valley View Community Unit School District 365U holds 51 homes there all the same. Answer that area with one name and that is what it is wrong about.

Who takes the other homes in its ZIP Codes

Valley View Community Unit School District 365U runs pre-K 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 — Lockport Township High School District 205, Plainfield School District 202 and Community High School District 99. They are neighbors on the same postal ground, not the next stop for its own students.

• Lockport Township High School District 20514,650 homes in 3 shared ZIP Code areas
• Plainfield School District 20214,310 homes in 4 shared ZIP Code areas
• Community High School District 9913,207 homes in 2 shared ZIP Code areas
• Naperville Community Unit District 20311,471 homes in 3 shared ZIP Code areas
• Woodridge School District 6811,138 homes in 2 shared ZIP Code areas
• Lemont Township High School District 2109,663 homes in 2 shared ZIP Code areas

Who it shares ZIP Codes with

Valley View Community Unit School District 365U shares ZIP Code areas with 12 different districts. The most frequent are Plainfield School District 202, Lockport Township High School District 205, Lemont-Bromberek Combined School District 113A and Cass School District 63. 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.

• Plainfield School District 2023 shared ZIP areas
• Lockport Township High School District 2052 shared ZIP areas
• Lemont-Bromberek Combined School District 113A1 shared ZIP area
• Cass School District 631 shared ZIP area
• Community High School District 991 shared ZIP area
• Woodridge School District 681 shared ZIP area

Where this district sits

• School districts in Illinois1,034 of 1,394 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 5 of the 8 ZIP Code areas Valley View Community Unit School District 365U 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.