Crime Grade · FBI UCR Data · 2025
Portsmouth, NH Crime Grade
How Portsmouth grades for violent crime against every other reporting U.S. city — and against the rest of New Hampshire — based on the FBI's Uniform Crime Reporting data.
National
6/10
vs. all U.S. cities ≥ 25,000 population
New Hampshire
10/10
vs. New Hampshire cities ≥ 10,000 population
In 2025, the violent crime rate in Portsmouth, NH was 203.0 per 100,000 residents (47 incidents over a population of 23,157). That puts Portsmouth 38% below the U.S. rate of 325.3 and 73% above the New Hampshire statewide rate of 117.2.
That ranks Portsmouth #2,065 of 3,771 ranked U.S. cities, safer than 45% of them, and #28 of 29 in New Hampshire. Violent crime is up 8% year over year and down 21% over the last five years.
Portsmouth, NH crime — key facts
- National Crime Grade
- C (6/10)
- New Hampshire Grade
- F (10/10)
- Violent crime rate
- 203.0 / 100k
- National rank
- #2,065 of 3,771
- NH rank
- #28 of 29
- Safer than
- 45% of U.S. cities
- Year over year
- up 8%
- 5-year change
- down 21%
- Population
- 23,157
- Reporting agency
- Portsmouth Police Department
- Data year
- 2025 · FBI UCR
Reported by Portsmouth Police Department (FBI ORI NH0085800) to the FBI Uniform Crime Reporting Program. Download the full dataset (CSV) · methodology.
About Portsmouth, NH
Also known as
- Strawberry-bank
- Pascataquack
- Strawberry Bancke
- Strawbery Banke
- Piscataqua
- Strabery Banke
- Strawberry Banke
- The Bank
History
Established in 1630. First named Strawberry Banke, but later changed to its present name because situated at the river mouth and a good harbor. ( Gannett, 1905 )
Name history sourced from the USGS Geographic Names Information System (GNIS) — public-domain federal geographic-names data.
Violent crime rate, 5-year trend
Per 100,000 residents. Portsmouth (red), New Hampshire (blue), U.S. average (gray dashed).
Portsmouth vs. U.S., 2025 — by offense
Rates per 100,000 residents for each offense category.
Full data, last 5 years
Rates per 100,000 residents. Raw counts in parentheses.
| Offense | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|
| Violent crime | 255.6(56) | 186.6(42) | 143.1(33) | 187.2(43) | 203.0(47) |
| Murder | 0.0(0) | 0.0(0) | 0.0(0) | 0.0(0) | 0.0(0) |
| Rape | 132.3(29) | 53.3(12) | 56.4(13) | 39.2(9) | 56.1(13) |
| Robbery | 4.6(1) | 8.9(2) | 13.0(3) | 8.7(2) | 4.3(1) |
| Aggravated assault | 118.7(26) | 124.4(28) | 73.7(17) | 139.3(32) | 142.5(33) |
| Property crime | 1483.1(325) | 1265.9(285) | 1049.6(242) | 1301.8(299) | 1140.0(264) |
| Burglary | 50.2(11) | 53.3(12) | 60.7(14) | 30.5(7) | 181.4(42) |
| Larceny | 1350.8(296) | 1123.8(253) | 919.5(212) | 1158.1(266) | 898.2(208) |
| Motor vehicle theft | 77.6(17) | 80.0(18) | 65.1(15) | 100.1(23) | 51.8(12) |
How the Crime Grade is calculated
- What is the source of the Portsmouth, NH Crime Grade?
- FBI Uniform Crime Reporting via the Crime Data Explorer. Agency-level data, pulled directly. No third-party aggregators, no proprietary score.
- What metric does the Portsmouth Crime Grade use?
- Violent crime rate per 100,000 residents (murder + rape + robbery + aggravated assault), most recent fully-reported year.
- How is the national decile for Portsmouth calculated?
- Portsmouth's rate placed against all FBI-reporting U.S. cities with population ≥ 25,000. 1 = safest.
- How is the New Hampshire state decile calculated?
- Same calculation restricted to New Hampshire cities with population ≥ 10,000.
- How do decile scores convert to a letter grade?
- 1–3 = A · 4–5 = B · 6–7 = C · 8 = D · 9–10 = F.
- How often is the Portsmouth Crime Grade refreshed?
- Twice a year. The FBI typically releases the prior year's full data each September.
- What are the limits of this Crime Grade?
- The FBI relies on local agency reporting. Rates reflect what was reported, not what occurred.
Nearby cities in New Hampshire
Comparable New Hampshire cities by population.
Compare Portsmouth to other places
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