Oak Forest ZIP Code Directory Coverage
The research verifies one mailing ZIP directly for Oak Forest. Other codes matter because USPS lists nearby post offices and Census search results display nearby ZCTAs, but neither fact makes those codes automatic Oak Forest city ZIPs. Address-level verification is the sound rule.
| ZIP Code | Areas Covered | Post Office | Notes |
|---|---|---|---|
| 60452 | Verified Oak Forest postal core | Oak Forest Post Office, 15811 Central Avenue | Direct city and post-office match |
| 60445 | Midlothian and nearby south suburbs | Midlothian context | Nearby ZCTA, not an automatic city ZIP |
| 60462 | Orland Park and nearby area | Orland Park context | Nearby ZCTA, not an automatic city ZIP |
| 60477 | Tinley Park nearby area | Tinley Park location | USPS nearby listing, not verified for the city |
| 60428 | Markham and Bremen Township context | Markham location | Useful at an unincorporated boundary seam |
| 60443 | Matteson nearby area | Matteson location | USPS nearby listing, not verified for the city |
The Oak Forest Post Office uses 60452-9998 as its own ZIP+4. That office point does not mean every nearby code serves Oak Forest addresses. The Census displays city geography beside ZCTAs 60445, 60452, and 60462, but a ZCTA is a statistical approximation of mail delivery geography.
60452 Anchors the Oak Forest ZIP Code Directory
The Oak Forest Post Office listing is the strongest current postal anchor. It places the office at 15811 Central Avenue, Oak Forest, Illinois 60452-9998. Listed retail hours are Monday through Friday from 8:00 a.m. to 6:00 p.m., Saturday from 8:00 a.m. to 3:00 p.m., and Sunday closed. The local phone is 708-687-2137.
The office detail confirms the postal core while its nearby-location list supplies boundary clues, not a resident list.
Nearby ZCTAs Are Not Oak Forest ZIP Codes
A ZCTA is built by the Census Bureau for statistics. It approximates the area served by a ZIP but does not issue mailing labels. That distinction matters for 60445 and 60462, which appear near Oak Forest in Census profile search but were not verified as mailing ZIPs for incorporated Oak Forest addresses.
Geography check. Treat 60445 and 60462 as nearby research leads until USPS verifies the exact address.
USPS also lists 60477, 60428, and 60443 among nearby postal locations. The ZIP code directory keeps them visible because a neighboring city, an unincorporated Bremen parcel, or an owner mailing address can surface during Oak Forest research. None should be promoted to an Oak Forest city ZIP without an address result.
USPS Fields for an Oak Forest ZIP Code Check
The official USPS lookup offers three paths: By Address, By City and State, and Cities by ZIP Code. The address path is the best way to settle a disputed label because it tests the complete mailing form.
| Lookup mode | Fields captured | Best use |
|---|---|---|
| By Address | Company, street, unit, city, state, urban code, optional ZIP | Verify one complete Oak Forest mailing address |
| By City and State | City, state | Review ZIP results tied to a postal city name |
| Cities by ZIP Code | ZIP | Check the city names USPS associates with a code |
USPS warns that a ZIP result does not confirm that a person or company occupies the address. It confirms postal formatting and delivery geography only.
Find an Oak Forest Resident by ZIP Code
A ZIP can narrow the field, but no researched public portal produces a full 60452 household roll. The best process verifies the postal label, fixes the parcel geography, and then uses only the official name tools that accept a ZIP or known address.
- Run USPS By Address to confirm the postal city, five-digit code, and unit form.
- Open CookViewer with the full address, PIN, or intersection and record municipality, township, and districts.
- Check the Assessor by PIN or address. Its public address form accepts city, not a ZIP filter.
- Use a ZIP-aware official portal only for a person or category already known, and read its result limits.
- Keep the ZIP result beside the source date and do not turn a narrow match into a block list.
Once the postal search reaches a street, the Oak Forest street directory can take over with the address and parcel chain.
ZIP-Aware Illinois Portals for Oak Forest Names
Several state tools use ZIP as one field, but each answers a different question. The voter lookup requires a supplied person's first and last name, birth date, and five-digit ZIP, then street number and a dynamic street name. It confirms a narrow registration match, not everyone in 60452.
| Official portal | ZIP-related fields | Meaning of a result |
|---|---|---|
| Illinois voter lookup | Name, birth date, ZIP, then street number and name | Person-specific registration match |
| IDFPR license lookup | Person or business, state, county, ZIP | Public professional credential |
| Illinois I-Cash | Name, city, ZIP, property ID | Possible unclaimed asset lead |
| ISP registry | Name, city, ZIP, county, map mode | Registry-specific match subject to warnings |
CookViewer accepts a full address rather than a dedicated ZIP filter, and the Assessor address form accepts city but not ZIP. A ZIP code directory should state those limits instead of promising a filter the portals do not have.
Crosswalk Every Oak Forest ZIP Code Result
The same property can carry several address-like values. Situs identifies the site. The owner mailing address is where tax mail goes and can be outside Oak Forest. The legal description and Cook PIN identify land. Postal city and ZIP describe delivery. Municipality and Bremen Township describe government geography.
- Situs address
- Locates the physical parcel in Assessor and GIS records.
- Owner mailing address
- Provides a tax-mail lead, not automatic residence.
- PIN and legal description
- Bridge deeds, plats, and boundary changes.
- Postal city and ZIP
- Record the USPS delivery label.
- Municipality and township
- Identify the public bodies and jurisdiction.
This crosswalk also guards against a multi-parcel address. Oak Forest project material for 15644 S Cicero Avenue identifies multiple PINs, so one street label may require more than one parcel search.
An Oak Forest ZIP Code at a Live Boundary Seam
A May 12, 2026 City Council agenda provides a concrete geography lesson. It identifies 5048 W 171st Street and PIN 28-28-402-042-0000 as an unincorporated Bremen Township parcel contiguous to Oak Forest, with no electors, in an annexation matter. The mailing label, township, parcel, and municipal status must therefore be stored separately.
The Oak Forest maps page adds ward, school, park, and other boundary context.
These layers explain local service districts, but none should be read as a postal boundary by itself.
Old Place Names in the Oak Forest ZIP Code Directory
Older records predate modern ZIP codes and may not use today's city name. The area began as Cooper's Grove, the post office was renamed New Bremen in 1848, and the earliest located Oak Forest wording comes from an 1893 railway timetable. The community incorporated as a village in 1947 and became a city in 1971.
Search an old directory, map, cemetery record, or deed under Bremen Township and the historical place variants, then bridge the record to the current PIN or legal description. No verified Oak Forest street-renumbering year was found, so a changed number should be investigated with plats, maps, CookViewer, CRS, Acorn, and SSGHS rather than assigned an invented date.
Oak Forest ZIP Code Lines Versus City Limits
ZIP boundaries support mail delivery and do not follow Oak Forest's corporate line. A 60452 label is strong postal evidence, but city jurisdiction should be checked with CookViewer and city maps. A nearby postal code, ZCTA, school district, or Bremen Township label is likewise a clue, not a substitute for the municipal field.
- ZIP and ZIP+4
- The five-digit delivery area and its more precise four-digit delivery segment.
- PO-box ZIP
- A code or delivery pattern used for post-office boxes rather than ordinary street delivery.
- Unique ZIP
- A code assigned to one high-volume organization; none was verified for Oak Forest in the research.
- Carrier route
- A postal delivery sequence inside a ZIP, not a city or census boundary.
For a hard case, use the access chain documented for Oak Forest: USPS online or the post-office counter, CookViewer and the Assessor, CRS, City Hall or Community Development, Bremen Township or county GIS, then Acorn and SSGHS for older roads and labels. A narrow Illinois FOIA request can seek an existing annexation, addressing, or map record, but it cannot require an agency to create a ZIP-wide resident roster.
Keep the source and date beside every postal result. USPS answers how mail is addressed now, the Census ZCTA approximates an area for statistics, and the county parcel identifies land. None replaces the others. If a form rejects 60452, check the street spelling, unit, directional, and preferred postal city before trying a nearby code. Do not force 60445 or 60462 onto an Oak Forest record merely because a map edge looks close.
A ZIP filter on I-Cash, a license lookup, or a voter confirmation narrows candidates but does not establish a complete local population. People can use mailing addresses outside the parcel where they own land, and organizations can appear in the same result set as individuals. Match the full name, city, record type, and another date or address fact before linking the result to a resident.