Merrimack, NH has a A+ safety grade (95/100) with a violent crime rate of 17 per 100,000, 95% below the national average.
FBI UCR 2023 · per-capita rates · mid-size city
Merrimack (29,515 people) sits in the mid-size municipal band. This page opens with per-100,000 FBI UCR rates, then NH and national benchmarks.
Data updated 2026-09-05
Merrimack, NH is among the safest cities in the country, and earns an A+ PlainCrime safety grade, where violent crime runs 95% below the U.S. average
According to the FBI Uniform Crime Reporting (UCR) Program for 2023, Merrimack, NH shows violent crime at 16.9 per 100,000 residents and property crime at 430.3 per 100,000. Violent crime runs 95% below the U.S. average. PlainCrime assigns grade A+ from those rates. Figures are voluntary agency submissions joined to population denominators; incomplete coverage can move the number.
Small-count caution
Merrimack reported 5 violent offences in 2023 against a population of 29,515. At this volume one additional or one fewer report moves the per-100,000 rate noticeably, so the figure is better read as a data point than as a precise measurement, and year-to-year swings here are expected.
Comparable rate records
The nearest comparable 2023 records to Merrimack's 16.9 violent-crime rate per 100,000 are Bedford (16.8), Amherst (16.7), Loudon (17.3), Windham (18.6). These are same-year agency submissions that pass the same completeness screen, not a claim that the cities have identical conditions. They make the cohort position above checkable against named records instead of a generic state average.
Position in the state cohort
At 16.9 reported violent offenses per 100,000 residents in 2023, Merrimack ranks 127 of 184 — above 57 of the 183 other New Hampshire cities whose 2023 submission passes this site’s completeness test. That is -66.2% against the cohort median of 50.2. Cities that did not report, or that reported implausibly low totals, are excluded from this cohort rather than counted as low-crime.
Offense mix
Violent offenses are 3.8% of the 132 Part I offenses reported in Merrimack for 2023, against a median of 9.1% across comparable New Hampshire cities — a gap of 5.3 points. Offense mix is shaped by which agencies report and how incidents are classified as well as by the underlying offenses, so it describes the reported record rather than a settled difference in conditions.
2020–2023 direction
Across 4 comparable reporting years, the rate moved from 18.8 per 100,000 in 2020 to 16.9 in 2023 (-9.9%). The highest observed value was 25.3 in 2021 and the lowest 16.9 in 2023. Years whose submission failed the completeness test are left out of this comparison rather than plotted as change.
Property counts dominate Merrimack's FBI UCR Table 8 municipal row. Per-100,000 rates use the reporting-year population on that row; cities that fail the completeness test stay out of rate rankings. A citywide figure rarely describes any single neighbourhood inside the municipal boundary.
Based on 5 reported violent incidents in a population of 29,650. At this volume, one additional or one fewer report can shift the rate and letter grade noticeably; small-city crime counts are inherently more volatile year to year than large-city counts, so treat this grade as a data point, not a precise ranking.
Mid-size municipal totals above are reported offenses, not safety advice for any single block. Reporting completeness still varies by year and agency.
Across 32.6 Census sq mi, Merrimack logged 3.9 property and 0.2 violent offenses per square mile in 2023.
Violent offenses are only 4% of the municipal total - a property-led book.
Density uses Census Gazetteer land area (32.6 sq mi); mix index is HHI x 10,000 on the offense-type shares above. Distinct from the per-100K rates in the hero.
| Offense | Count | Rate /100K |
|---|---|---|
| Property Crime | 127 | 430.3 |
| Burglary | - | - |
| Larceny-Theft | - | - |
| Motor Vehicle Theft | - | - |
| Arson | - | - |
| Violent Crime | 5 | 16.9 |
| Murder | - | - |
| Rape | - | - |
| Robbery | - | - |
| Aggravated Assault | - | - |
The chart omits 2024 rather than drawing an unsupported zero or partial-coverage dip. The table preserves the year and marks the gap.
Lead series · fell across 4 comparable years · FBI UCR
Secondary series · fell · 2020-2023 · FBI UCR
| Year | Coverage | Population | Violent Rate | Property Rate |
|---|---|---|---|---|
| 2020 | Comparable | 26,602 | 18.8 | 695.4 |
| 2021 | Comparable | 27,656 | 25.3 | 546 |
| 2022 | Comparable | 27,403 | 21.9 | 427 |
| 2023 | Comparable | 29,515 | 16.9 | 430.3 |
| 2024 | Insufficient reporting | 29,650 | - | - |
Merrimack Police Department filed the 2023 UCR row behind Merrimack's 132 reported offenses (4-year span 2020-2023).
This agency reports via NIBRS, the incident-based system that captures more detail per offense (multiple crimes per incident, victim/offender data) than the older summary counts.
Crime rates read differently at different scales, so these are the New Hampshire cities closest to Merrimack in population. Their populations run from 22,969 to 34,207, against 29,650 here. Or use our side-by-side compare tool to benchmark two cities directly.
Merrimack sits at 16.9/100K violent (grade A+); the New Hampshire cities below are the nearest matches after size peers are removed.
In 2023, Merrimack reported 5 violent crimes and 127 property crimes, for a total of 132 reported offenses.
Mid-size read: Merrimack figures are FBI UCR CIUS Table 8 (vintage 2023), population-adjusted per 100,000.
Denominators are the reporting-year population on the municipal row. Incomplete years are dropped from rankings. Confirm at FBI Crime Data Explorer and Census.gov QuickFacts.
Disclaimer (mid-size municipal): figures are informational, not advice. FBI Uniform Crime Reporting (UCR) Program is the source. Consult a professional before decisions.
Mid-size rate methodology for how Merrimack's mid-size city row is sourced and ranked.
Source: FBI Uniform Crime Reporting (UCR) Program CIUS Table 8 municipal crime rates · 2023 Merrimack, NH rates use the reporting-year population on the municipal row.
Bulk download: city crime dataset (CSV/JSON)
Put this to use
Put the Merrimack, NH FBI UCR record to work: compare peers, open the state atlas, or look up another city.
A citywide UCR rate is a starting point, not a neighbourhood verdict: read the full profile and the year coverage notes before drawing conclusions.
Every figure on PlainCrime is rendered directly from FBI Uniform Crime Reporting (UCR) source data, no number is typed in by an editor. Merrimack is scored in the mid-size municipal band (29,515 on the row). See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.