| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Blaker, Lillestrøm | 1925 |
| Postal/ZIP Codes in Enebakkneset, Lillestrøm | 1910 |
| Postal/ZIP Codes in Fetsund, Lillestrøm | 1900 |
| Postal/ZIP Codes in Frogner, Lillestrøm | 2016 |
| Postal/ZIP Codes in Gan, Lillestrøm | 1903 |
| Postal/ZIP Codes in Kjeller, Lillestrøm | 2007 |
| Postal/ZIP Codes in Leirsund, Lillestrøm | 2015 |
| Postal/ZIP Codes in Lillestrøm, Lillestrøm | 2000, 2003, 2004 |
| Postal/ZIP Codes in Rånåsfoss, Lillestrøm | 1927 |
| Postal/ZIP Codes in Skedsmokorset, Lillestrøm | 2019, 2020 |
| Postal/ZIP Codes in Skjetten, Lillestrøm | 2013 |
| Postal/ZIP Codes in Sørum, Lillestrøm | 1923 |
| Postal/ZIP Codes in Sørumsand, Lillestrøm | 1920 |
| Postal/ZIP Codes in Strømmen, Lillestrøm | 1465, 1466, 1467, 2010 |