Monroe County, IL ZIP Codes
9 ZIP codes cover all or part of Monroe County, Illinois. The Census Bureau counts 35,036 residents in the county, with a median household income of $102,880 and a median home value of $282,100. Median household income ranges from $79,688 in 62278 to $108,981 in 62236. Its largest communities include Waterloo, Columbia, Dupo, Red Bud and Valmeyer.
Monroe County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 35,036 |
| Households | 13,851 |
| Median household income | $102,880 |
| Median home value | $282,100 |
| Median age | 43.2 |
| Median rent | $1,042 |
All 9 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 42,638 |
| Households (sum of ZIP codes) | 16,922 |
| Median household income, range across ZIP codes | $79,688 (62278) to $108,981 (62236) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $99,836 |
| Homeowners | 84.0% |
| Households with kids under 18 | 31.8% |
| Moved in the past year | 7.3% |
| Carrier routes in EDDM2GO's route library | 32 routes, 16,485 homes (4 of 9 ZIP codes) |
Top facts
- Highest median household income in Monroe County: 62236 ($108,981)
- Most residents: 62298 (18,208 people)
- Highest homeownership: 62298 (85.3% own their home)
- Most households with kids: 62236 (35.3% of households)
- Most new movers: 62236 (8.0% moved in last year)
- Youngest median age: 62278 (40.8 years)
- Highest median home value: 62236 ($306,600)
Every ZIP code in Monroe County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 62298 | Waterloo | 18,208 | 7,213 | $101,155 | $290,200 | 85.3% | 31.2% | 7.7% | 13 | 7,843 | 91% of its land |
| 62236 | Columbia | 14,154 | 5,485 | $108,981 | $306,600 | 85.3% | 35.3% | 8.0% | 12 | 6,131 | 82% of its land |
| 62278 | Red Bud | 6,281 | 2,640 | $79,688 | $178,300 | 79.7% | 29.3% | 6.8% | 6 | 3,007 | 54% of its land |
| 62295 | Valmeyer | 1,459 | 547 | $87,989 | $203,400 | 81.9% | 27.6% | 3.9% | — | — | 100% of its land |
| 62277 | Prairie Du Rocher | 940 | 424 | $67,969 | $128,100 | 84.2% | 25.0% | 8.6% | — | — | 39% of its land |
| 62244 | Fults | 928 | 352 | $107,917 | $252,400 | 77.0% | 24.7% | 0.9% | 1 | 434 | 100% of its land |
| 62248 | Hecker | 521 | 207 | $79,583 | $166,800 | 75.8% | 30.0% | 4.9% | — | — | 100% of its land |
| 62279 | Monroe County | 112 | 42 | $139,063 | — | 100.0% | 28.6% | 0.0% | — | — | 100% of its land |
| 62256 | Maeystown | 35 | 12 | $126,250 | $158,300 | 100.0% | 25.0% | 0.0% | — | — | 100% of its land |
A ZIP code is listed for Monroe County when at least 10% of its land is in the county, when it holds at least 10% of the county's land, or when the county is its main county. Totals add up whole ZIP codes, including parts that cross the county line; the Census county figures above do not.
Cities and communities
- Waterloo — 11,129 residents · 1 ZIP code
- Columbia — 11,127 residents · 1 ZIP code
- Dupo — 3,879 residents · 2 ZIP codes
- Red Bud — 3,782 residents · 1 ZIP code
- Valmeyer — 1,090 residents · 1 ZIP code
- Hecker — 521 residents · 1 ZIP code
- Ruma — 394 residents · 1 ZIP code
- Maeystown — 65 residents · 2 ZIP codes
- Paderborn — 20 residents · 1 ZIP code
- Fults — 12 residents · 1 ZIP code
- Floraville — 0 residents · 1 ZIP code
Price a mailing to Monroe County ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Monroe County, IL?
- 62298, 62236, 62278, 62295, 62277, 62244, 62248, 62279 and 62256. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of Monroe County?
- 35,036 residents in 13,851 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in Monroe County?
- $102,880 for the county as a whole. Its ZIP codes range from $79,688 (62278) to $108,981 (62236).
- Which Monroe County ZIP code has the highest median household income?
- 62236, at $108,981, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Monroe County?
- For the 4 of 9 ZIP codes in EDDM2GO's stored route library: 32 carrier routes reaching 16,485 residential and 929 business mailboxes. The route map loads the rest when you search them.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.