Baytown ZIP Code Directory Coverage
Four ZIP codes have documented Baytown mailing evidence: 77520, 77521, 77522, and 77523. For Baytown ZIP research, the Texas Government Postal Commission table supports the listed ZIP and place relationship, while Baytown city and election records add local examples. USPS remains the address-level authority when a postal table and a local map seem to conflict. The table records Baytown starting points, not a promise that each number defines the same legal area.
| ZIP code | Baytown-area coverage lead | Post office route | Boundary note |
|---|---|---|---|
| 77520 | Central and older Baytown mailing examples | USPS address lookup | A Baytown postal city does not establish the Harris parcel or city limits. |
| 77521 | Baytown city and election-notice examples | USPS address lookup | Check the Baytown GIS layer for north, east, ETJ, and county routing. |
| 77522 | Baytown City Hall contact-line example | USPS address lookup | The current Baytown postal or PO-box classification still needs USPS confirmation. |
| 77523 | Chambers-side Baytown Cedar Bayou election-material example | USPS address lookup | The number also serves areas beyond Baytown and cannot prove incorporation. |
The USPS ZIP Code Lookup offers ZIP by address, ZIP by city and state, and cities by ZIP. Its address form takes a required street address, with an optional company, apartment or suite, and optional ZIP. USPS warns that its result does not confirm a person or company at a Baytown address. Use it to normalize Baytown mail data before searching a county source.
Note: Record the date of a USPS result because ZIP delivery information and local GIS layers are not permanent evidence of jurisdiction.
Baytown ZIP Code County Split
Baytown is a two-county city. A Baytown address belongs in Harris County or Chambers County, not both, and a Baytown mailing line does not choose the county for you. That is the key Baytown ZIP code issue. Use the full address in Baytown Specific Web Maps to identify jurisdiction, zones, utilities, school districts, parks, and city resources. Then compare the Baytown result with the city-limits map and the county tied to the parcel.
For Baytown Harris addresses, the appraisal route is the Harris Central Appraisal District property search and its interactive maps. For Baytown Chambers addresses, use the Chambers County Appraisal District and its map. A city or ETJ map is not a county clerk record, and an appraisal entry is not recorded-title proof.
If the map leaves the Baytown route uncertain, Baytown Planning and Development Services is at 2401 Market Street and lists 281-420-5394. The Baytown City Clerk is at the same address and lists 281-420-6697. The Harris County Clerk's Baytown Annex is at 701 W Baker Road, and Chambers County offices provide routes at Anahuac and the West Annex in Mont Belvieu. These are the documented Baytown counter or phone fallbacks before a ZIP-based search is treated as conclusive.
Search Baytown ZIP Code Fields
ChambersCAD is the documented ZIP-capable property route for the Chambers side of Baytown. It accepts ZIP with both owner and property criteria. Its visible controls also include tax year, property type, sorting, and results per page. That makes a Baytown postal-area query a useful parcel lead, provided the Baytown result is checked against the county line and the record's stated tax year. The Harris HCAD guidance supports address searching, but its live ZIP-filter behavior was not confirmed because the host returned a 403 response during research.
| ChambersCAD field | Search group | Required? | Use and limit |
|---|---|---|---|
| City, State, ZIP | Owner criteria | Not documented as required | Pairs a ZIP with owner-search fields; it does not establish an occupant. |
| City, State, ZIP | Property criteria | Not documented as required | Pairs a ZIP with parcel-related search fields. |
| Tax Year | Result control | Selectable | Keep the selected year beside the property result. |
| Property Type | Result control | Selectable | Use the stated category rather than assuming all property is included. |
| Sort By and Results Per Page | Result control | Selectable | These change display order, not the underlying county jurisdiction. |
The ChambersCAD property-search interface is shown here.
The image illustrates why a Baytown ZIP is only one field within a county property search. The resulting Baytown appraisal entry can provide parcel, owner or mailing, situs, legal-description, value, exemption, and map leads, but it is not a current-residency finding or a recorded deed.
Find Records by Baytown ZIP Code
A Baytown ZIP-based search works best as a routing sequence. It begins with postal validation, then moves to Baytown local geography and a county-specific source. The aim is to find the correct Baytown record system, not to make a broad list of people. If the task becomes a street-level history question after the county is known, the Baytown street directory provides the address-focused record trail.
- Enter the full mailing address in USPS ZIP Code Lookup and retain the normalized ZIP result.
- Check the same address through Baytown Specific Web Maps, the city-limits material, and the applicable GIS layer to identify the county or ETJ context.
- For a Chambers address, use ChambersCAD's ZIP, city, or property fields and preserve the displayed tax year; for a Harris address, use the documented address route at HCAD.
- When a civic or election record is needed, choose the Harris or Chambers election office associated with that address, not simply the postal city.
- Confirm any legal fact with the office that holds the original record, such as the applicable county clerk for a recorded instrument.
For Baytown municipal documents that mention a street or project, Baytown's city archive can search Keywords, Archive, Time Period, and start and end dates. Its categories include City Clerk notices, Municipal Court archived documents, permit reports, budgets, public notices, police annual reports, and property-tax rates. That Baytown search can identify the original document or custodian, but it does not create a resident record.
Baytown ZIP Code Voter Data
Harris Precinct Data has an option for all voters by ZIP in CSV form, as well as precinct and district choices. The listed product fields are certificate number, status, precinct, effective date, voter name, address, city, state, and ZIP. For Baytown, it is a regulated election-data product, not a general residential listing. The source warns that using the information to advertise or promote commercial products is an offense under Texas Election Code Section 18.009.
Written requests for Harris voter services may be submitted in person, by email, fax, or mail to the voter office. Phone orders are not accepted, payment is in advance, and the inspected services page did not show current product fees. For Baytown's Chambers side, the County Clerk/elections route must be checked separately. The Texas Secretary of State voter-file request form is an additional statewide channel with geography, status, date, age, and county or election options, but its access rules and possible cost estimate apply.
The Harris Precinct Data page is shown here.
The request interface helps distinguish a ZIP filter from an identity conclusion. Protected voters and address-confidentiality participants are omitted or shielded, and ballot choices are not public even where participation history may be available.
Note: Direct protected-address questions to the county elections office; a missing address may reflect a confidentiality rule rather than an incomplete ZIP search.
Compare Baytown ZIP Code Maps
Postal geography needs a map check in Baytown because ZIPs can cross Baytown city limits, ETJ, school districts, utility districts, precincts, and county lines. Baytown's public ArcGIS layer service includes ZIP layer 16 with the field alias Zip_Code. The Baytown city-limits PDF and the layer can show the relationship between a postal polygon and municipal geography, but USPS remains the authority for a particular delivery address.
Baytown map data needs a date. The production voting-precinct layer reflected Harris County 2026 changes in its February 27, 2026 metadata. A saved Baytown screenshot can therefore misroute a later search. Use a current Baytown address, record the access date, and compare a ZIP layer with the applicable county's map or appraisal route before ordering a county record.
Baytown ZIP Code Boundary Limits
ZIP codes are USPS delivery geographies, not municipal boundaries. Baytown reports city, ETJ, limited-annexation, and strip-annexation areas, while local materials place Baytown addresses on both the Harris and Chambers sides. A Baytown, Texas mailing city and ZIP are discovery inputs. Exact Baytown parcel, incorporation, and jurisdiction answers come from the Baytown map system and the county that serves the address.
- ZIP code
- A postal delivery area. It can cross a city line or county line and should not be used as proof of either.
- ZIP+4
- A more detailed postal add-on used to sort delivery. It does not turn a postal result into a jurisdiction record.
- PO-box ZIP
- A ZIP used for post-office boxes. Research did not confirm whether any documented Baytown ZIP has that current classification, so verify it with USPS.
- Carrier route
- A delivery-routing grouping. It can help mail sorting but is not a parcel boundary or resident list.
Baytown ZIP Code Search Cautions
A Baytown ZIP result does not prove who lives at a Baytown address. It also does not prove that a Baytown property owner, a voter record, or a historical directory entry is the same person. Appraisal records may show an owner or mailing field rather than a present occupant, and protected information can be suppressed. Check the Baytown record type, county, date, and access limit before relying on a name or address lead.
When a Baytown result is missing, do not widen the search with private identifiers or automated collection. Recheck the apartment or suite, old Baytown community name, county, city-limit or ETJ status, and source date. Then use the documented Baytown fallback: county offices for appraisal or clerk questions, public computers at the Chambers deed room when appropriate, and a written Texas Public Information Act request for existing municipal records. A records request does not require an agency to create a new report or conduct legal research.