Duncan, OK ZIP Codes
2 ZIP codes serve Duncan, Oklahoma: 73533 and 73055. Together they are home to 37,682 residents in 15,243 households. That is more than the 22,958 people counted inside Duncan city limits, because these ZIP codes reach past its boundary. Median household income ranges from $59,906 in 73533 to $65,991 in 73055.
Duncan city limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 22,958 |
| Households | 9,492 |
| Median household income | $58,054 |
| Median home value | $131,500 |
| Median age | 39.9 |
| Median rent | $896 |
All 2 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 37,682 |
| Households (sum of ZIP codes) | 15,243 |
| Median household income, range across ZIP codes | $59,906 (73533) to $65,991 (73055) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $61,483 |
| Homeowners | 73.1% |
| Households with kids under 18 | 30.6% |
| Moved in the past year | 14.5% |
| Carrier routes in EDDM2GO's route library | not loaded yet |
Top facts
- Highest median household income in Duncan: 73055 ($65,991)
- Most residents: 73533 (27,618 people)
- Highest homeownership: 73055 (78.4% own their home)
- Most households with kids: 73533 (30.7% of households)
- Most new movers: 73533 (15.8% moved in last year)
- Youngest median age: 73055 (40.3 years)
- Highest median home value: 73055 ($164,800)
Every ZIP code in Duncan
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 73533 | Duncan | 27,618 | 11,292 | $59,906 | $144,500 | 71.2% | 30.7% | 15.8% | — | — | 10% of its land; mailing city |
| 73055 | Marlow | 10,064 | 3,951 | $65,991 | $164,800 | 78.4% | 30.2% | 11.1% | — | — | 4% of its land |
A ZIP code is listed for Duncan when at least 10% of its land lies inside Duncan city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Duncan. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Duncan.
Counties
- Stephens County — 8 ZIP codes
Price a mailing to Duncan ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Duncan, OK?
- 73533 and 73055. A ZIP code is listed for Duncan when at least 10% of its land lies inside Duncan city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Duncan.
- What is the population of Duncan, OK?
- The Census Bureau counts 22,958 residents inside Duncan city limits (ACS 2020–2024). The 2 ZIP codes that serve Duncan hold 37,682 residents in all.
- What is the median household income in Duncan, OK?
- $58,054 inside Duncan city limits, per the Census Bureau. Across its ZIP codes the medians run from $59,906 to $65,991.
- Which Duncan ZIP code has the highest median household income?
- 73055, at $65,991, among ZIP codes with at least 1,000 residents.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.