WATERLOO, IL ZIP Code
| City | WATERLOO | 
| State | Illinois | 
| ZIP Codes count | 1 (see all) | 
| Post offices count | 1 (see all) | 
| Total population | 10,268 (see all) | 
ZIP Code in WATERLOO, Illinois
62298
This list contains only 5-digit ZIP codes. Use our zip code lookup by address feature to get the full 9-digit (ZIP+4) code.
List of WATERLOO, IL ZIP Codes
| ZIP | TYPE | POPU | 
|---|---|---|
| 62298 | STANDARD | 17,024 | 
Post offices
| WATERLOO — Post Office™ 305 E 3RD ST WATERLOO, IL 62298-9998 | 
Envelope example
On the bottom center of the envelope, write the address you want your letter delivered to. Include the following on separate lines:
- Recipient's full name
- Full street address
- City, State, and ZIP Code
Using the same format, write the return address in the top left corner.
Using the full ZIP+4 Code when mailing via the USPS ensures the fastest, most accurate mailing possible. If you are not sure of the full 9-digit ZIP Code, use the 5-digit ZIP Code to avoid loss of letter or package.

The recipient address information is provided for your reference.
Address example
390 BETTY DR
WATERLOO IL 62298-1068
WATERLOO IL 62298-1068
17 CAROL DR
WATERLOO IL 62298-5543
WATERLOO IL 62298-5543
123 DEBRA LN
WATERLOO IL 62298-1408
WATERLOO IL 62298-1408
453 SYCAMORE DR
WATERLOO IL 62298-1739
WATERLOO IL 62298-1739
203 THOMAS LN
WATERLOO IL 62298-5511
WATERLOO IL 62298-5511
3521 TRAITEUR HILL LN
WATERLOO IL 62298-4317
WATERLOO IL 62298-4317
Map
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Census data for WATERLOO, IL
Demographic and housing estimates in WATERLOO, IL
| Total population | 10,268 | 
| Male | 4,808 | 
| Female | 5,460 | 
| Total population | 10,268 | 
| Under 5 years | 607 | 
| 5 to 9 years | 710 | 
| 10 to 14 years | 805 | 
| 15 to 19 years | 350 | 
| 20 to 24 years | 553 | 
| 25 to 34 years | 1,215 | 
| 35 to 44 years | 1,417 | 
| 45 to 54 years | 1,421 | 
| 55 to 59 years | 618 | 
| 60 to 64 years | 672 | 
| 65 to 74 years | 869 | 
| 75 to 84 years | 679 | 
| 85 years and over | 352 | 
| Median age (years) | 40.9 | 
| Under 18 years | 2,341 | 
| 16 years and over | 8,085 | 
| 18 years and over | 7,927 | 
| 21 years and over | 7,726 | 
| 62 years and over | 2,332 | 
| 65 years and over | 1,900 | 
| Total population | 10,268 | 
| One race | 10,212 | 
| White | 10,036 | 
| Black or African American | 43 | 
| American Indian and Alaska Native | 0 | 
| Asian | 122 | 
| Native Hawaiian and Other Pacific Islander | 0 | 
| Some other race | 11 | 
| Two or more races | 56 | 
| Citizen, VOTING AGE 18 and over population | 7,909 | 
| Male Citizen, VOTING AGE 18 and over population | 3,783 | 
| Female Citizen, VOTING AGE 18 and over population | 4,126 | 
Social characteristics in WATERLOO, IL
| Total households | 4,271 | 
| Family households (families) | 2,966 | 
| Married-couple family | 2,410 | 
| Male householder, no wife present, family | 301 | 
| Female householder, no husband present, family | 255 | 
| Nonfamily households | 1,305 | 
| Average household size | 2.37 | 
| Average family size | 2.92 | 
Economic characteristics in WATERLOO, IL
| Total households | 4,271 | 
| Less than $10,000 | 178 | 
| $10,000 to $14,999 | 197 | 
| $15,000 to $24,999 | 431 | 
| $25,000 to $34,999 | 267 | 
| $35,000 to $49,999 | 649 | 
| $50,000 to $74,999 | 651 | 
| $75,000 to $99,999 | 601 | 
| $100,000 to $149,999 | 794 | 
| $150,000 to $199,999 | 347 | 
| $200,000 or more | 156 | 
| Median household income (dollars) | 68,911 | 
Housing characteristics in WATERLOO, IL
| Total housing units | 4,373 | 
| Occupied housing units | 4,271 | 
| Vacant housing units | 102 | 
| Total housing units | 4,373 | 
| 1-unit, detached | 3,328 | 
| 1-unit, attached | 225 | 
| 2 units | 348 | 
| 3 or 4 units | 42 | 
| 5 to 9 units | 123 | 
| 10 to 19 units | 120 | 
| 20 or more units | 147 | 
| Mobile home | 40 | 
| Boat, RV, van, etc. | 0 | 
| Total housing units | 4,373 | 
| Built 2014 or later | 60 | 
| Built 2010 to 2013 | 343 | 
| Built 2000 to 2009 | 1,103 | 
| Built 1990 to 1999 | 796 | 
| Built 1980 to 1989 | 446 | 
| Built 1970 to 1979 | 254 | 
| Built 1960 to 1969 | 454 | 
| Built 1950 to 1959 | 374 | 
| Built 1940 to 1949 | 93 | 
| Built 1939 or earlier | 450 | 
| Total housing units | 4,373 | 
| 1 room | 224 | 
| 2 rooms | 53 | 
| 3 rooms | 280 | 
| 4 rooms | 649 | 
| 5 rooms | 719 | 
| 6 rooms | 713 | 
| 7 rooms | 728 | 
| 8 rooms | 478 | 
| 9 rooms or more | 529 | 
| Median rooms | 5.9 | 
| Total housing units | 4,373 | 
| No bedroom | 224 | 
| 1 bedroom | 281 | 
| 2 bedrooms | 1,061 | 
| 3 bedrooms | 2,082 | 
| 4 bedrooms | 563 | 
| 5 or more bedrooms | 162 | 
| Occupied housing units | 4,271 | 
| Owner-occupied | 3,238 | 
| Renter-occupied | 1,033 | 
| Average household size of owner-occupied unit | 2.59 | 
| Average household size of renter-occupied unit | 1.69 | 
| Occupied housing units | 4,271 | 
| Moved in 2017 or later | 188 | 
| Moved in 2015 to 2016 | 512 | 
| Moved in 2010 to 2014 | 1,075 | 
| Moved in 2000 to 2009 | 1,479 | 
| Moved in 1990 to 1999 | 432 | 
| Moved in 1989 and earlier | 585 | 
| Owner-occupied units | 3,238 | 
| Less than $50,000 | 102 | 
| $50,000 to $99,999 | 200 | 
| $100,000 to $149,999 | 693 | 
| $150,000 to $199,999 | 764 | 
| $200,000 to $299,999 | 1,128 | 
| $300,000 to $499,999 | 336 | 
| $500,000 to $999,999 | 15 | 
| $1,000,000 or more | 0 | 
| Median (dollars) | 189,400 | 
| Owner-occupied units | 3,238 | 
| Housing units with a mortgage | 2,001 | 
| Housing units without a mortgage | 1,237 | 
| Occupied units paying rent | 1,003 | 
| Less than $500 | 90 | 
| $500 to $999 | 526 | 
| $1,000 to $1,499 | 354 | 
| $1,500 to $1,999 | 33 | 
| $2,000 to $2,499 | 0 | 
| $2,500 to $2,999 | 0 | 
| $3,000 or more | 0 | 
| Median (dollars) | 842 | 
| No rent paid | 30 | 
Data is based on 2018 Census
ZIP Codes for other locations
State for WATERLOO
Illinois ZIP CodesOther cities in Illinois