| City: | Duncan, Oklahoma |
| Names to Avoid: | Halliburton |
| County: | Stephens County |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 7:09:24 PM |
| Population: | No Population Data |
| Area Code: | 580 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 34.5023, -97.9576 |
| Quick Link: |
Halliburton, one of the world's largest oilfield services companies, operates under dedicated ZIP code 73536 in Duncan, Oklahoma. Founded in 1919 by Erle P. Halliburton as a pioneer in oil well cementing, the company established its headquarters in Duncan in 1921 before moving corporate operations to Dallas in 1961. Despite that move, Duncan remains home to major Halliburton manufacturing facilities, including a 500,000-square-foot center opened in 1964 and a research center established in 1980. This postal designation has served the company for over two decades.
No specific buildings or delivery codes appear in postal records for this ZIP, suggesting a specialized corporate mail designation. Census data is unavailable, consistent with a commercial-industrial function. Duncan serves as the valid mailing city for this historic Halliburton location in Stephens County.
ZIP Code 73536 is assigned to a single organization or institution. Detailed business demographics are not published for unique ZIP Codes.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 0Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 0Source: CBP |
| 1st Quarter Payroll: | $0Source: CBP |
| Annual Payroll: | $0Source: CBP |
| # of Employees: | 0Source: CBP |
ZIP Code 73536 is located in Stephens County, Oklahoma, within the Duncan, OK Metropolitan Statistical Area (CBSA 20340). This Micro area has a population of 43,314 people, about 0.00% of whom live in ZIP Code 73536. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Duncan, OKSource: Census |
| CBSA Number: | 20340Source: Census |
| CBSA Type: | MicroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 43,314Source: Census |
| MSA: | Source: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | No DistrictsSource: USPS |
| Congressional Land Area: | sq miSource: Census |
| PMSA: | Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 4021900Source: Census |
| Place Name: | Duncan city; OklahomaSource: Census |
We could not locate which school district 73536 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on January 1, 2026.