Department profile · Mercer County
Mercer County Sheriffs Department
Reported as: Mercer Co Sheriffs DeptCounty sheriff
Jurisdiction context
Civil service jurisdiction
Discipline at this department is governed by the Title 4A civil service framework, matched to Mercer County on the New Jersey Civil Service Commission roster.
Read how the process works or the Title 4A glossary. Browse NJCSNavigator’s civil service jurisdiction directory for the full local-jurisdiction roster.
Reflects the NJCSC Appendix A roster as of 2026-07-04. Context only, not legal advice.
Sworn officers, 2025
4[1]
IA investigations, 2025
4[1]
Incidents, 2025
4[1]
Major discipline records
0
All years, 2020-2025
Internal affairs investigations by year
| 2021 | 2022 | 2023 | 2025 |
|---|---|---|---|
| 5 | 21 | 18 | 4 |
Complaint mix, 2025
Most serious allegation per investigation, as categorized by the reporting agency. Allegations are not findings: of 4 investigations, 3 reported one or more sustained complaints. Officer-level rows list 4 officers involved.[6]
Most serious allegation
| Other Departmental Rule Violation | 2 |
|---|---|
| Improper Arrest | 1 |
| Demeanor | 1 |
Internal disposition
| Sustained | 3 |
|---|---|
| Unfounded | 1 |
Against peers, 2025
| Mercer Co Sheriffs Dept | 100.0 |
|---|---|
| County median, county sheriff (1) | 100.0 |
| NJ median, county sheriff (20) | 115.2 |
Investigations per 100 sworn officers, using the officer counts each agency reported for 2025. A higher number is ambiguous on its own: it can reflect more misconduct, or a stronger internal reporting culture. Medians are computed within the same agency type only.
Major discipline records
No major discipline records appear for this agency in the 2020-2025 releases. Absence of records is not a finding; see the methodology for what this data does and does not cover.
Questions and answers
- How many internal affairs investigations did Mercer County Sheriffs Department report in 2025?
- Mercer County Sheriffs Department reported 4 internal affairs investigations in 2025, according to New Jersey Attorney General data. It reported 4 sworn officers that year.
- How many major discipline records does Mercer County Sheriffs Department have?
- No major discipline records appear for Mercer County Sheriffs Department in the Attorney General's 2020-2025 releases. Absence of records is not a finding; discipline is listed only after all appeals conclude.
Sources
- [1]New Jersey Internal Affairs Agency Totals, 2021-2025. New Jersey Office of the Attorney General. Sheet "Sheet1", row 2295. Snapshot retrieved 2026-06-09. ↩
- [2]New Jersey Internal Affairs Agency Totals, 2021-2025. New Jersey Office of the Attorney General. Sheet "Sheet1", row 263. Snapshot retrieved 2026-06-09. ↩
- [3]New Jersey Internal Affairs Agency Totals, 2021-2025. New Jersey Office of the Attorney General. Sheet "Sheet1", row 1280. Snapshot retrieved 2026-06-09. ↩
- [4]New Jersey Internal Affairs Agency Totals, 2021-2025. New Jersey Office of the Attorney General. Sheet "Sheet1", row 1783. Snapshot retrieved 2026-06-09. ↩
- [5]New Jersey Internal Affairs Agency Totals, 2021-2025. New Jersey Office of the Attorney General. Sheet "Sheet1", row 2295. Snapshot retrieved 2026-06-09. ↩
- [6]New Jersey Internal Affairs Investigations, 2024-2025. New Jersey Office of the Attorney General. Sheet "Sheet1", row 1. Snapshot retrieved 2026-06-09. Aggregated from every Mercer Co Sheriffs Dept row for 2025; row 1 is the header. ↩