Windsor ZIP Code Directory Map
Research found three Windsor postal patterns that should be separated rather than presented as three equal residential zones. 80550 is the primary standard-delivery association. 80528 appears in an official Larimer service-fee chart as Windsor 80528 (80550), a useful Fort Collins postal edge clue. 80551 appears in official facility records, including the former Eastman Kodak site, and should be treated as a unique or legacy facility code until USPS confirms a current result. For a Windsor resident lookup, this split matters only after a full address validation.
| Windsor ZIP code | Areas or addresses | Post-office note | Windsor caveat |
|---|---|---|---|
| Windsor 80550 | Primary Windsor standard-delivery area; also appears with an acceptable Severance city name in postal reference material | Windsor postal association; verify with USPS | Windsor ZIPs cross town and county geography |
| Windsor 80528 | Larimer service material associates Windsor with 80528 (80550) | Windsor postal city and address usage need a live USPS check | Windsor postal line is not town line |
| Windsor 80551 | Official facility records use Windsor for a former Eastman Kodak site and similar facility context | Not a general residential Windsor ZIP without current USPS confirmation | Windsor unique or legacy code caution |
The USPS ZIP Lookup is the authority for a live Windsor address result. The Windsor ZIP Code Directory should show the research trail and caveats, not turn a postal label into a boundary graphic that the sources do not support.
80550 Windsor Delivery Core
80550 is the common Windsor standard-delivery code in town records. It can also appear with Severance as an acceptable city name in postal material, which is why a city string alone cannot pick the Windsor county or municipal boundary. Use the full street address and state in USPS By Address, then preserve the standardized output beside the parcel's Windsor situs and mailing fields.
Once the Windsor ZIP is confirmed, a property search can use the address or owner. A Windsor voter tool uses ZIP as part of a one-person identity check, not as a ZIP-wide resident browser. A recorder index uses legal description, party, document, reception, and date fields instead of ZIP. The Windsor ZIP code directory therefore hands the result to the right record system rather than pretending every system has a ZIP filter.
For a Windsor unit, rural route, business, or newly developed street, test the address exactly as USPS formats it and keep the apartment or suite detail separate from the parcel address. A corrected city line may be useful for delivery while the assessor still keeps a Windsor situs. That is a normal difference between postal standardization and local land records.
Note: A Windsor postal city can be acceptable for more than one nearby place, so the address and county remain the stronger keys.
80528 Postal Edge
The official Larimer Sheriff service-fee chart lists Windsor 80528 (80550). That notation is a local postal clue, not a verified realignment history or a promise that every 80528 address sits inside Windsor. A representative Windsor address should be checked through USPS and then placed on the Larimer or Weld parcel map.
For a Windsor address that returns 80528, record the exact postal city, ZIP, county, parcel, and situs. If the property portal or assessor uses another city string, keep both values and label them. A city directory, voter record, or deed may preserve the older or legal form. Do not discard it merely because USPS standardized a current mailing line.
80551 Facility ZIP Caution
80551 is the most striking Windsor ZIP quirk. Official facility records use it in Windsor, including the former Eastman Kodak site, but the static research pass did not expose a current USPS city result. Treat it as a unique, single-institution, or legacy code until a live USPS address check confirms how it is used today.
That distinction matters for a Windsor resident lookup. A facility ZIP can appear in a business, property, environmental, or planning record without describing a general residential delivery area. Search the facility name, parcel, address, or legal description through the county and Town sources for Windsor. If the question is historical, keep the old ZIP and publication date as source facts rather than forcing a current postal interpretation.
Windsor ZIP Code Search Steps
A Windsor ZIP-keyed search should move from postal validation to spatial and record checks. County portals do not all accept ZIP as a direct search field. Weld's Property Portal uses partial address, owner, account, subdivision, parcel, section-township-range, and API number. Larimer's public data includes mailing and Windsor situs ZIP fields, while the live search controls were dynamic. GIS tools work by parcel geometry and address points.
- Enter the full Windsor street address, city, and Colorado in USPS By Address, adding unit or company detail when needed.
- Write down the standardized Windsor ZIP and postal city, then locate the address in WING or the county GIS viewer.
- Search the Windsor assessor by address, account, parcel, or owner and compare situs, mailing, county, and tax-year fields.
- Use a voter ZIP only with first name, last name, and date of birth for a person match, not a ZIP-wide list.
- For street-level work after the ZIP is narrowed, use the Windsor street directory address chain.
The correct endpoint is a dated parcel or person record, not a list assembled from an unverified ZIP table.
The captured Weld Property Portal gives the ZIP page a real parcel-search fallback.
The portal result route separates address, map, and full property report links.
USPS Windsor ZIP Field Controls
The USPS lookup offers three modes for Windsor. By Address returns a standardized ZIP for a street, city, and state. By City and State returns associated ZIPs. Cities by ZIP Code returns associated city names. Multiple Windsor matches may need an apartment, suite, or company value. USPS also warns that a ZIP result does not prove a person or company is at an address.
| Mode | Field | Required or optional | Result |
|---|---|---|---|
| Windsor By Address | Street, city, state | Required | Standardized ZIP result |
| Windsor By Address | Company, apartment, ZIP | Optional narrowing fields | More precise Windsor match |
| Windsor By City and State | City and state | Required | Associated ZIPs |
| Windsor Cities by ZIP Code | ZIP code | Required | Associated postal names |
| Windsor AIS viewer | City, state, county, ZIP+4, address | Separate monthly-updated route | Windsor delivery and address data |
Windsor USPS data is postal data. It does not replace the county's legal description, assessor situs, or Town boundary.
Windsor ZIP Parcel And Mailing Fields
A Windsor ZIP can be read three ways in a property record: it can belong to the physical situs, the owner mailing address, or a separate postal label shown in the report. Larimer's Owner Location table separates Windsor situs street components from owner mailing lines. Weld's full report separates property address and owner mailing address, then adds legal description, subdivision, block, lot, section-township-range, tax year, document history, and taxing authorities for a Windsor property.
The sample Weld report inspected for research showed account R7176398, parcel 080717409017, a Windsor situs, owner names, a matching owner mailing address, document history, building facts, valuation, and tax authorities. It is a field model, not a claim about every parcel.
The Weld Property Report sample shows how a ZIP is embedded in a broader property record.
Use the current report for the parcel in question and preserve the tax year and access date.
Windsor ZIP Geography And City Limits
ZIP boundaries and Windsor town limits are different maps. Windsor sits between Fort Collins, Loveland, and Greeley, with a county line through the municipality. A legal Windsor parcel may use a Fort Collins postal city or a facility ZIP. A postal Windsor address can sit outside the incorporated line or use a nearby community label. Town GIS directs Windsor parcel and street questions to Larimer or Weld.
- Windsor ZIP code
- A postal delivery area identifier. It is not a parcel, voter precinct, county, or municipal boundary.
- Windsor ZIP+4
- A more precise Windsor postal extension used within a ZIP for delivery routing. It does not identify a household publicly.
- Windsor PO-box ZIP
- A code used for post-office box delivery rather than a broad street-delivery area.
- Windsor unique ZIP
- A code associated with one Windsor institution, facility, or special delivery context.
- Windsor carrier route
- A postal delivery route inside the wider ZIP system, not a Windsor resident directory.
Boundary check. Keep the postal city, ZIP, county, municipal status, and parcel situs as separate fields. A mismatch is a clue to verify, not an error to erase.
Windsor ZIP Code Gaps To Verify
No verified Windsor-specific ZIP realignment or split year was located. The static pass also did not expose a current USPS city result for a representative 80528 or 80551 address, and Weld's public property form did not expose a ZIP-specific field. Larimer's interactive ZIP behavior was not captured. These Windsor gaps should remain visible.
For a current Windsor search, verify a full address with USPS, then use WING, county GIS, assessor data, and the relevant recorder. For a historical Windsor search, test 80550, 80528, and 80551 only when the source supports them, then prioritize street, parcel, subdivision, county, and legal description. The Postmaster Finder can supply history but warns its ZIP entries may not be current.
USPS offers three useful modes: By Address, which requires street, city, and state; City/State, which returns associated ZIP information for a named place; and Cities by ZIP Code, which lists postal names associated with a code. The tool also exposes an AIS route for address and delivery data. These are postal research modes, not public household searches. Keep the input address and the returned standardization so a later assessor or recorder check can be reproduced.
If a ZIP result conflicts with a deed or parcel card, preserve both values and ask which field is being measured. The conflict may be situs versus mailing, current delivery versus historical publication, or a facility code versus residential service.
The Larimer Assessor Public Data page shows the county-side ZIP fields used for owner and situs research.
CSV run dates and tax years should travel with any ZIP-based extract.