Rules for ZIP Code 66203
Shawnee Mission, KS · Johnson County
ZIP 66203 is governed by the city of Merriam, KS. We do not hold its code yet, and Johnson County ordinances do not apply inside its limits.
ZIP code 66203 lies in the city of Merriam, KS, which holds about 51% of the ZIP's residents and writes its own local code. We have not added Merriam's ordinances yet, so nothing is shown below: Johnson County rules govern only unincorporated land and do not reach inside Merriam.
ZIP codes do not follow city lines. 66203 also covers:
- city of Shawnee~42% of residents · not covered yet
Shares are estimates from 2020 Census geography. If your address is in one of these, its rules apply instead.
Each topic below links to the full ordinance breakdown with specific code sections, fine amounts, and answers to common questions. The data is sourced from the official municipal code and verified by our editorial team.
Merriam is not covered yet
The city of Merriam writes its own code; the county's rules do not apply inside it.Request Merriam coverage →
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