School districts in Delaware
50% of the 68 populated ZIP Code areas in Delaware are served by more than one school district — 34 of them, which puts the state 26th among the fifty-two. It is organized into 16 unified districts, the largest being Christina at 72,415 homes. Its most divided ZIP Code area, 19802, is split between 4 districts for elementary grades alone. The two districts that share the most ZIP Codes here are Christina and Colonial, in 6 of them. Counted by homes rather than by ZIP Code area, 65% of the state's housing sits in a ZIP Code that more than one district serves.
How often a ZIP Code here crosses a district line
The state is close to the national rate of 53%. Every count below comes from the census blocks in each ZIP Code area rather than from any published table; Christina is the largest district in it, at 72,415 homes.
- ZIP Code areas with a district68
- Served by more than one district34 (50%)
- Grade school and high school differ0 (0%)
- No high school district named0
- Unified districts16
- Elementary districts0
- Secondary districts0
- Homes in no district at all0
The largest districts in Delaware
The top of the list is unusually flat: Christina, Indian River and Red Clay Consolidated are within a few percent of each other at around 72,415 homes apiece. Where districts are evenly matched, no one of them owns a postal area, and the shares below tend to be split rather than lopsided.
The most divided ZIP Code area in Delaware
ZIP Code area 19802 holds 11,427 homes, and 4 districts each take a meaningful share of them for elementary grades — Brandywine first at 55%, then Red Clay Consolidated. A lookup that names the first is describing that share of the homes and silently not the 5,125 homes that remain.
Each percentage here is a share of the 11,427 homes counted in ZIP Code 19802, not the chance that any one address is in that district. Enrollment follows the street: two houses on opposite sides of the same road can be in different districts, and only the district office can say which.
Every track below is 35 cells long and stands for all 11,427 homes counted in ZIP Code 19802, so one cell is 326 homes, rounded to the nearest whole cell. Cells lit solid are the homes one district holds, and the unlit cells are the homes held by the other districts in the same list.
- Brandywine School District6,302 of 11,427 homes55%
- Red Clay Consolidated School District4,469 of 11,427 homes39%
- Colonial School District387 of 11,427 homes3.4%
- Christina School District269 of 11,427 homes2.4%
For grade school, an answer of one district name would be wrong for 5,125 of the 11,427 here.
How much of Delaware a single district name misses
Across the 68 ZIP Code areas in Delaware with homes in them, an answer of one district name misses 39,273 of the 448,905 homes they hold — 8.7% of the state. In 31 of those areas the single name is the whole truth; in the other 37 it is not.
In ZIP Code 19701 · Bear, Delaware the largest district for grade school is Christina, and naming it alone misses 8,118 of the 16,362 homes counted there. The rest are with Colonial and Appoquinimink.
In ZIP Code 19901 · Dover, Delaware the largest district for grade school is Capital, and naming it alone misses 5,287 of the 15,083 homes counted there. The rest are with Caesar Rodney.
ZIP Code 19802 · Wilmington, Delaware names 4 districts. Brandywine is the largest of them for grade school, and an answer of its name alone misses 5,125 of the 11,427 homes there; Red Clay Consolidated, Colonial and Christina hold the rest.
Where a ZIP Code here names more than one district
Of the 68 ZIP Code areas in Delaware that the federal file names a district for, 34 name more than one school district. These are the 12 with the most, starting at 4 districts in one postal area: Wilmington, Seaford and Bear. Each row opens the full answer for that ZIP Code, with every district named for grade school and for high school and the share of the homes each one holds.
- ZIP Code 19802 · Wilmington, Delaware4 districts · 11,427 homes
- ZIP Code 19973 · Seaford, Delaware4 districts · 10,547 homes
- ZIP Code 19701 · Bear, Delaware3 districts · 16,362 homes
- ZIP Code 19702 · Glasgow, Delaware3 districts · 21,815 homes
- ZIP Code 19801 · Wilmington, Delaware3 districts · 8,678 homes
- ZIP Code 19904 · Dover, Delaware3 districts · 14,806 homes
- ZIP Code 19940 · Delmar, Delaware3 districts · 2,600 homes
- ZIP Code 19941 · Ellendale, Delaware3 districts · 1,147 homes
- ZIP Code 19946 · Frederica, Delaware3 districts · 2,098 homes
- ZIP Code 19947 · Georgetown, Delaware3 districts · 7,074 homes
- ZIP Code 19952 · Harrington, Delaware3 districts · 4,498 homes
- ZIP Code 19953 · Hartly, Delaware3 districts · 1,769 homes
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: 34 of the 68 ZIP Code areas in Delaware with a district named for them are served by more than one school district, and the line between two of 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.