Crime Grade · FBI UCR Data · 2025
South Lyon, MI Crime Grade
How South Lyon grades for violent crime against every other reporting U.S. city — and against the rest of Michigan — based on the FBI's Uniform Crime Reporting data.
National
2/10
vs. all U.S. cities ≥ 25,000 population
Michigan
1/10
vs. Michigan cities ≥ 10,000 population
In 2025, the violent crime rate in South Lyon, MI was 48.6 per 100,000 residents (6 incidents over a population of 12,346). That puts South Lyon 85% below the U.S. rate of 325.3 and 89% below the Michigan statewide rate of 422.8.
That ranks South Lyon #480 of 3,771 ranked U.S. cities, safer than 87% of them, and #10 of 138 in Michigan. Violent crime is down 17% year over year and down 17% over the last five years.
South Lyon, MI crime — key facts
- National Crime Grade
- A (2/10)
- Michigan Grade
- A (1/10)
- Violent crime rate
- 48.6 / 100k
- National rank
- #480 of 3,771
- MI rank
- #10 of 138
- Safer than
- 87% of U.S. cities
- Year over year
- down 17%
- 5-year change
- down 17%
- Population
- 12,346
- Reporting agency
- South Lyon Police Department
- Data year
- 2025 · FBI UCR
Reported by South Lyon Police Department (FBI ORI MI6374800) to the FBI Uniform Crime Reporting Program. Download the full dataset (CSV) · methodology.
Violent crime rate, 5-year trend
Per 100,000 residents. South Lyon (red), Michigan (blue), U.S. average (gray dashed).
South Lyon 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 | 58.8(7) | 75.8(9) | 101.1(12) | 58.3(7) | 48.6(6) |
| Murder | 0.0(0) | 0.0(0) | 0.0(0) | 0.0(0) | 0.0(0) |
| Rape | 25.2(3) | 33.7(4) | 42.1(5) | 33.3(4) | 32.4(4) |
| Robbery | 0.0(0) | 0.0(0) | 0.0(0) | 0.0(0) | 8.1(1) |
| Aggravated assault | 33.6(4) | 42.1(5) | 59.0(7) | 25.0(3) | 8.1(1) |
| Property crime | 319.4(38) | 455.1(54) | 278.0(33) | 291.4(35) | 356.4(44) |
| Burglary | 25.2(3) | 25.3(3) | 25.3(3) | 25.0(3) | 16.2(2) |
| Larceny | 268.9(32) | 421.4(50) | 227.4(27) | 208.2(25) | 234.9(29) |
| Motor vehicle theft | 25.2(3) | 8.4(1) | 25.3(3) | 58.3(7) | 105.3(13) |
How the Crime Grade is calculated
- What is the source of the South Lyon, MI 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 South Lyon 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 South Lyon calculated?
- South Lyon's rate placed against all FBI-reporting U.S. cities with population ≥ 25,000. 1 = safest.
- How is the Michigan state decile calculated?
- Same calculation restricted to Michigan 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 South Lyon 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 Michigan
Comparable Michigan cities by population.
Compare South Lyon to other places
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