Alexander County, IL ZIP codes
There are 7 ZIP codes in Alexander County, IL, in 7 towns, from 62914 to 62993. The largest are 62914 (Cairo), 62988 (Tamms) and 62990 (Thebes).
The county seat is Cairo.
- ZIP codes
- 7
- Towns
- 7
- County seat
- Cairo
- County FIPS
17003- State
- Illinois
- Population
- 4,875
- Median household income
- $47,043
- Land area
- 235 sq mi
- Metro area
- Cape Girardeau
Alexander County ZIP codes by town
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Alexander County ZIP codes
The ZIP codes of Alexander County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Alexander County in numbers
About 4,875 people live in Alexander County, in 1,904 households, the 98th most populous of Illinois's 102 counties. The median household income is $47,043 a year, 44% below the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $59,800 (77% below the Illinois median), and median gross rent is $656 a month. The median age is 48.0; 12.6% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 31 minutes.
| Population | 4,875 |
|---|---|
| Households | 1,904 |
| Median age | 48.0 |
| Median household income | $47,043 |
| Median home value | $59,800 |
| Median gross rent | $656 |
| Bachelor's degree or higher | 12.6% |
| Mean commute | 30.6 min |
| Population density | 21 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Alexander County
| Town | ZIP codes | Population |
|---|---|---|
| Cairo | 1 | 1,682 |
| Mc Clure | 1 | 640 |
| Tamms | 1 | 589 |
| Olive Branch | 1 | 499 |
| Thebes | 1 | 353 |
| Unity | 1 | 77 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Alexander County.
Not sure you are in Alexander County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Alexander County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
62914 | Cairo , IL | Standard | 1,765 | $41,103 | $31,900 |
62957 | Mc Clure , IL | Standard | 640 | $46,053 | $71,300 |
62962 | Miller City , IL | Standard | 0 | — | — |
62969 | Olive Branch , IL | Standard | 314 | — | $62,100 |
62988 | Tamms , IL | Standard | 1,149 | $54,779 | $65,800 |
62990 | Thebes , IL | Standard | 973 | $64,076 | $136,900 |
62993 | Unity , IL | No street area | — | — | — |
Cite this page
zipcodes.pro. “Alexander County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/il/county/alexander
Underlying data is public domain or openly licensed — sources, vintages and licences.