City profile · Town
Derby, Connecticut
Reviewed Oct 13, 2026Who leads Derby, with the evidence behind the record.
City leadership
- Leader
- Joseph L. DiMartino
- Role
- Mayor
- Population
- 12,391
- Census Bureau estimate
- Last verified
- Oct 13, 2026
- Confirmed by a reviewer against a source
- Last checked
- Oct 13, 2026
- The check matched the published record
Source & verification
- Verification sourcederbyct.gov/mayors-office ↗
- Official leadership pagederbyct.gov/mayors-office ↗
- City websitederbyct.gov ↗
“Last checked” is when we last looked at the source. “Last verified” is when the record was last confirmed. A page we couldn't read never counts as a verification.
Record history
Published records only. Possible changes still under review are not shown here.
Leaders on record
- Joseph L. DiMartino CurrentMayor · added Oct 13, 2026 · verified Oct 13, 2026
- Richard Dziekan FormerMayor · added May 4, 2026
Reviewed changes
- Oct 13, 2026 · Accepted by reviewerRichard Dziekan replaced by Joseph L. DiMartino, MayorSource: derbyct.gov/mayors-office ↗
Demographics
Census Bureau data for the city
- Population
- 12,391
- Median household income
- $69,835
- Median age
- 46
- Land area
- 5.06 sq mi
- Population density
- 2,448.8 per sq mi
- County
- Naugatuck Valley Planning Region County
- Metro area
- Waterbury-Shelton, CT
Use this record in your app
The same leadership and verification fields are available from the API.
curl https://api.civicgrid.org/cities/2279 \
-H "Authorization: Bearer cg_live_..."