ZIP Code 53066 · Summit, Wisconsin
Waukesha County · 15,955 counted · 4 districts
Each percentage here is a share of the 15,955 homes counted in ZIP Code 53066, 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.
The districts named for the early grades in ZIP Code 53066, Summit, Wisconsin are not the districts named for high school, and the set changes in both directions: 1 district arrives for high school only, 1 runs the early grades and stops, and 2 serve both bands. 4 districts hold the 15,955 homes counted here between them, and Oconomowoc Area is the largest by homes. The largest share leaves 1,668 homes elsewhere: 1,589 homes with Kettle Moraine and Stone Bank; 79 homes in districts too small to name here. Districts holding under half a percent of the homes named at their own level are listed separately below and are not counted in that number.
Three districts share the early grades
3 districts hold a measurable share of ZIP Code 53066 at this level. Oconomowoc Area is the largest with 14,287 homes; the smallest of them holds 667 homes. Stone Bank is named here for grade school and not for high school.
Every track below is 35 cells long and stands for all 15,955 homes counted in ZIP Code 53066, so one cell is 456 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.
- Oconomowoc Area School District14,287 of 15,955 homes90%
- Kettle Moraine School District922 of 15,955 homes5.8%
- Stone Bank School District667 of 15,955 homes4.2%
Below half a percent at the grade school level: Watertown School District and Hartford Joint No. 1 School District hold 79 homes between them, which is why they are counted under the list rather than inside it. A lookup that named them alongside the districts above would be listing a boundary crossing rather than an answer.
Three districts share high school
3 districts hold a measurable share of ZIP Code 53066 at this level. Oconomowoc Area is the largest with 14,287 homes; the smallest of them holds 667 homes. Arrowhead Union High is named here for high school and not for the early grades.
- Oconomowoc Area School District14,287 of 15,955 homes90%
- Kettle Moraine School District922 of 15,955 homes5.8%
- Arrowhead Union High School District667 of 15,955 homes4.2%
Below half a percent at the high school level: Watertown School District and Hartford Union High School District hold 79 homes between them, which is why they are counted under the list rather than inside it. A lookup that named them alongside the districts above would be listing a boundary crossing rather than an answer.
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
Then confirm it with the district office. Each district named here, with its NCES district ID, website and phone:
- Oconomowoc Area School District NCES ID 5510890 oasd.org (262) 560-2111
- Kettle Moraine School District NCES ID 5503510 kmsd.edu (262) 968-6300
- Arrowhead Union High School District NCES ID 5506180 arrowheadschools.org (262) 369-3611
- Stone Bank School District NCES ID 5509390 stonebank.k12.wi.us (262) 966-2900
The set of names changes in both directions
Arrowhead Union High is named for high school here and for no elementary grades, and Stone Bank runs the early grades and no more. An address on the wrong street can therefore change district at the change of grade and land in a district that was never part of its elementary answer, while a neighbor two blocks away keeps one name the whole way through.
What one district name costs in 53066
A lookup that answers ZIP Code 53066 with one district name has to pick one of the names below and drop the rest. Measured against the 15,955 homes counted here, for the early grades it is wrong for 1,668 homes and for high school it is wrong for 1,668 homes. That is the whole difference between this page and a one-line answer: the same federal file, read to the end instead of to the first row.
The districts that reach into 53066
The districts named above are not alike in size or in reach. Kettle Moraine touches 13 ZIP Code areas in all and holds 922 homes inside this one; Stone Bank touches 3 areas. Oconomowoc Area is the only district in at least one ZIP Code area somewhere in the country, while Arrowhead Union High is never the only one anywhere: every postal area it touches, it shares.
- Oconomowoc Area School District14,287 of 15,955 here · 11 ZIP areas in all
- Kettle Moraine School District922 of 15,955 here · 13 ZIP areas in all
- Arrowhead Union High School District667 of 15,955 here · 8 ZIP areas in all
- Stone Bank School District667 of 15,955 here · 3 ZIP areas in all
Where Oconomowoc Area goes from here
Oconomowoc Area School District runs pre-K through grade 12, and it is the only school district serving 2 of the 11 ZIP Code areas it touches, shares 7 more with neighbors, and holds under half a percent of the homes in the remaining 2. Inside its own boundary it holds 16,317 homes over 111 square miles; the part of it counted in ZIP Code 53066 is 14,287 of those. The district it shares the most postal ground with is Kettle Moraine School District, across 3 ZIP Code areas. Its thinnest measured foothold is elsewhere: in ZIP Code area 53018 it holds 30 of 3,206 homes, or 0.9% of them.
How 53066 compares in Wisconsin
Across Wisconsin the boundary file names more than one district in 600 of the 781 ZIP Code areas it names a district for, 77% of them, and 0 areas in the state have no high school district named for part of their homes. Counting the districts named at either level, 75 areas in Wisconsin name more than this ZIP Code does and 595 name fewer. Nationally more than one district is named in 53% of 33,555 areas.
Look up 53066 again, or look up another ZIP Code
The lookup holds every ZIP Code area in the country with homes in it, including the ones with no page of their own. Opening it at 53066 recomputes the same 15,955 homes from the same snapshot, and typing five other digits answers for somewhere else. No server is asked for the answer: the whole index travels with the lookup page itself.
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: 1,668 of the 15,955 homes counted in 53066 sit outside the district holding the most of them, and the line between the two runs along streets rather than around the postal area.
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.
What this site can hand you instead:
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.