Crime Grade · FBI UCR Data · 2025
Algonquin, IL Crime Grade
How Algonquin grades for violent crime against every other reporting U.S. city — and against the rest of Illinois — based on the FBI's Uniform Crime Reporting data.
National
2/10
vs. all U.S. cities ≥ 25,000 population
Illinois
2/10
vs. Illinois cities ≥ 10,000 population
In 2025, the violent crime rate in Algonquin, IL was 45.5 per 100,000 residents (14 incidents over a population of 30,758). That puts Algonquin Infinity% above the U.S. rate of 0.0 and 81% below the Illinois statewide rate of 245.7.
That ranks Algonquin #439 of 3,771 ranked U.S. cities, safer than 88% of them, and #39 of 214 in Illinois. Violent crime is down 23% year over year and down 42% over the last five years.
Algonquin, IL crime — key facts
- National Crime Grade
- A (2/10)
- Illinois Grade
- A (2/10)
- Violent crime rate
- 45.5 / 100k
- National rank
- #439 of 3,771
- IL rank
- #39 of 214
- Safer than
- 88% of U.S. cities
- Year over year
- down 23%
- 5-year change
- down 42%
- Population
- 30,758
- Reporting agency
- Algonquin Police Department
- Data year
- 2025 · FBI UCR
Reported by Algonquin Police Department (FBI ORI IL0560100) to the FBI Uniform Crime Reporting Program. Download the full dataset (CSV) · methodology.
Violent crime rate, 5-year trend
Per 100,000 residents. Algonquin (red), Illinois (blue), U.S. average (gray dashed).
Algonquin 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 | 77.9(24) | 49.6(15) | 59.8(18) | 59.4(18) | 45.5(14) |
| Murder | 6.5(2) | 0.0(0) | 0.0(0) | 0.0(0) | 0.0(0) |
| Rape | 35.7(11) | 23.2(7) | 16.6(5) | 29.7(9) | 29.3(9) |
| Robbery | 0.0(0) | 3.3(1) | 0.0(0) | 0.0(0) | 0.0(0) |
| Aggravated assault | 35.7(11) | 23.2(7) | 43.2(13) | 29.7(9) | 16.3(5) |
| Property crime | 620.2(191) | 993.0(300) | 827.5(249) | 1201.8(364) | 933.1(287) |
| Burglary | 35.7(11) | 69.5(21) | 89.7(27) | 112.3(34) | 29.3(9) |
| Larceny | 561.8(173) | 860.6(260) | 724.5(218) | 1049.9(318) | 890.8(274) |
| Motor vehicle theft | 16.2(5) | 49.6(15) | 13.3(4) | 33.0(10) | 9.8(3) |
How the Crime Grade is calculated
- What is the source of the Algonquin, IL 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 Algonquin 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 Algonquin calculated?
- Algonquin's rate placed against all FBI-reporting U.S. cities with population ≥ 25,000. 1 = safest.
- How is the Illinois state decile calculated?
- Same calculation restricted to Illinois 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 Algonquin 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 Illinois
Comparable Illinois cities by population.
Compare Algonquin to other places
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