| Zipcode | Community | City | State | Metro Area |
|---|---|---|---|---|
| 14743 | Ischua | Hinsdale | New York | Olean NY |
| 38852 | Iuka | Iuka | Mississippi | |
| 42045 | Iuka | Grand rivers | Kentucky | Paducah KY-IL |
| 62849 | Iuka | Iuka | Illinois | Centralia IL |
| 67066 | Iuka | Iuka | Kansas | |
| 77420 | Iago | Boling | Texas | El Campo TX |
| 83201 | Isu | Pocatello | Idaho | Pocatello ID |
| 83209 | Isu | Pocatello | Idaho | Pocatello ID |
| 84066 | Ioka | Roosevelt | Utah | |
| 96047 | Igo | Igo | California | Redding CA |
| 98027 | Issaquah | Issaquah | Washington | Seattle-Tacoma-Bellevue WA |
| 98029 | Issaquah | Issaquah | Washington | Seattle-Tacoma-Bellevue WA |
| 98075 | Issaquah | Sammamish | Washington | Seattle-Tacoma-Bellevue WA |
| 99613 | Igiugig | King salmon | Alaska | |