Seaman Unified School District 345

It never has a ZIP Code to itself

The counts below come from the census blocks assigned to Seaman Unified School District 345, 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 boundary8,407
• Residents20,573
• ZIP Code areas it reaches4
• Where it is the only district0
• Where it shares with another district3
• Where it holds under half a percent1
• Land area82 square miles
• Homes per square mile102

The ZIP Code areas it reaches

The spread is the thing to notice. In 66617 this district holds 96% of the homes; in 66512 it holds 1 home, 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 66617 · Topeka, Kansas96% of the homes
• ZIP Code 66618 · Topeka, Kansas93% of the homes
• ZIP Code 66608 · Topeka, Kansas57% of the homes
• ZIP Code 66512 · Meriden, Kansas1 home, under half a percent

What one name misses in the areas it leads

Seaman Unified School District 345 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 1,522 of the 9,928 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.

ZIP Code 66608 · Topeka, Kansas is a two-district area: 1,460 of its 2,567 homes are inside Seaman Unified School District 345, and the other 1,107 homes are with Topeka Public Schools Unified School District 501. Which one an address belongs to is settled by the street, not by the five digits.

Seaman Unified School District 345 holds 3,457 of the 3,728 homes in ZIP Code 66618 · Topeka, Kansas, so its name is right for most of the area and wrong for the rest: 271 homes with Silver Lake Unified School District 372 and Topeka Public Schools Unified School District 501.

In ZIP Code 66617 · Topeka, Kansas the split runs 3,489 to 144 and the larger part is Seaman Unified School District 345's: the rest is 134 homes with Jefferson West Unified School District 340 and Perry Public Schools Unified School District 343 and 10 homes in a district too small to name here.

Who takes the other homes in its ZIP Codes

Seaman Unified School District 345 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 — Jefferson West Unified School District 340, Topeka Public Schools Unified School District 501 and Silver Lake Unified School District 372. They are neighbors on the same postal ground, not the next stop for its own students.

• Jefferson West Unified School District 3401,409 homes in 2 shared ZIP Code areas
• Topeka Public Schools Unified School District 5011,129 homes in 2 shared ZIP Code areas
• Silver Lake Unified School District 372249 homes in 1 shared ZIP Code area
• Perry Public Schools Unified School District 34385 homes in 2 shared ZIP Code areas
• Royal Valley Unified School District 33713 homes in 1 shared ZIP Code area
• Valley Falls Unified School District 33812 homes in 1 shared ZIP Code area

Who it shares ZIP Codes with

These districts appear alongside Seaman Unified School District 345 in the same ZIP Code areas: Topeka Public Schools Unified School District 501, Jefferson West Unified School District 340, Perry Public Schools Unified School District 343 and Silver Lake Unified School District 372. 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.

• Topeka Public Schools Unified School District 5012 shared ZIP areas
• Jefferson West Unified School District 3401 shared ZIP area
• Perry Public Schools Unified School District 3431 shared ZIP area
• Silver Lake Unified School District 3721 shared ZIP area

Where this district sits

• School districts in Kansas480 of 702 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 3 of the 4 ZIP Code areas Seaman Unified School District 345 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.