Fitchburg, Massachusetts ZIP Codes
- ZIP records
1 - Sum of listed ZIP population estimates
41,839 - Counties represented
1 - Population range
41,839–41,839 per ZIP
Population sum includes positive estimates in these ZIP records; it is not an official city population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | County | Population estimate |
|---|---|---|---|---|
| 1 | 01420 | Fitchburg | Worcester | 41,839 |
Counties represented
All ZIP Codes in Fitchburg
Browse all ZIP data for Massachusetts
Methodology: ZIP records are grouped by the source file's primary city and state fields. Population ranges and sums use positive ZIP-level estimates; sums should not be read as official city totals. County links use each record's listed county assignment.