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Idaho Falls School District 91

Idaho · runs pre-K through grade 12

NCES ID 1601530 · (208) 525-7500

There is no ZIP Code area where Idaho Falls School District 91 is the only school district serving the homes. It holds a real share in 4 of them and shares every one, with 4 different districts in total. A lookup that returns a single district name for any of those ZIP Codes is guessing which side of a line an address falls on.

It never has a ZIP Code to itself

The counts below come from the census blocks assigned to Idaho Falls School District 91, 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 boundary24,250
  • Residents62,277
  • ZIP Code areas it reaches5
  • Where it is the only district0
  • Where it shares with another district4
  • Where it holds under half a percent1
  • Land area339 square miles
  • Homes per square mile72

The ZIP Code areas it reaches

The spread is the thing to notice. In 83402 this district holds 97% of the homes; in 83444 it holds 2 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 83402 · Idaho Falls, Idaho97% of the homes
  • ZIP Code 83404 · Idaho Falls, Idaho82% of the homes
  • ZIP Code 83401 · Idaho Falls, Idaho33% of the homes
  • ZIP Code 83406 · Ammon, Idaho0.7% of the homes
  • ZIP Code 83444 · Roberts, Idaho2 homes, under half a percent

What one name misses in the areas it leads

Idaho Falls School District 91 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 1,987 of the 20,915 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.

Idaho Falls School District 91 holds 7,984 of the 9,681 homes in ZIP Code 83404 · Idaho Falls, Idaho, so its name is right for most of the area and wrong for the rest: 1,697 homes with Bonneville Joint School District 93 and Shelley Joint School District 60.

In ZIP Code 83402 · Idaho Falls, Idaho the split runs 10,944 to 290 and the larger part is Idaho Falls School District 91's: the rest is 285 homes with Shelley Joint School District 60 and Jefferson County Joint School District 251; 5 homes in a district too small to name here.

Idaho Falls School District 91 reaches into ZIP Code 83401 · Idaho Falls, Idaho with 5,275 of its 15,922 homes; 3 districts there hold a real share of it, and Bonneville Joint School District 93 leads them. The familiar answer for that area is one of the others, and it is wrong for those 5,275 homes.

Idaho Falls School District 91 is not the name anyone would give for ZIP Code 83406 · Ammon, Idaho — Bonneville Joint School District 93 leads it — and Idaho Falls School District 91 holds 45 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

Idaho Falls School District 91 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 — Bonneville Joint School District 93, Jefferson County Joint School District 251 and Shelley Joint School District 60. They are neighbors on the same postal ground, not the next stop for its own students.

Who it shares ZIP Codes with

These districts appear alongside Idaho Falls School District 91 in the same ZIP Code areas: Bonneville Joint School District 93, Shelley Joint School District 60, Jefferson County Joint School District 251 and Ririe Joint School District 252. 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.

Idaho Falls School District 91 and Bonneville Joint School District 93 school district boundary: the ZIP Codes they share

  • ZIP Code 83401 · Idaho Falls, Idaho
  • ZIP Code 83404 · Idaho Falls, Idaho
  • ZIP Code 83406 · Ammon, Idaho

Idaho Falls School District 91 and Shelley Joint School District 60 school district boundary: the ZIP Codes they share

  • ZIP Code 83402 · Idaho Falls, Idaho
  • ZIP Code 83404 · Idaho Falls, Idaho

Idaho Falls School District 91 and Jefferson County Joint School District 251 school district boundary: the ZIP Codes they share

  • ZIP Code 83402 · Idaho Falls, Idaho

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

Where this district sits

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: in 4 of the 5 ZIP Code areas Idaho Falls School District 91 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.

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.

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.