Lake St. Louis, MO has a A safety grade (89/100) with a violent crime rate of 57 per 100,000, 84% below the national average.
FBI UCR 2024 · per-capita rates · mid-size city
Lake St. Louis (19,334 people) sits in the mid-size municipal band. This page opens with per-100,000 FBI UCR rates, then MO and national benchmarks.
Data updated 2026-08-24
Lake St. Louis, MO carries a PlainCrime A safety grade with violent crime 84% below the U.S. average
According to the FBI Uniform Crime Reporting (UCR) Program for 2024, Lake St. Louis, MO shows violent crime at 56.9 per 100,000 residents and property crime at 605.2 per 100,000. Violent crime runs 84% 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
Lake St. Louis reported 11 violent offences in 2024 against a population of 19,334. 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 2024 records to Lake St. Louis's 56.9 violent-crime rate per 100,000 are Ballwin (56.3), O'Fallon (59.0), Bernie (54.7), Odessa (53.1). 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.
2020–2024 direction
Across 5 comparable reporting years, the rate moved from 105.0 per 100,000 in 2020 to 56.9 in 2024 (-45.8%). The highest observed value was 188.9 in 2021 and the lowest 56.9 in 2024. Years whose submission failed the completeness test are left out of this comparison rather than plotted as change.
Position in the state cohort
At 56.9 reported violent offenses per 100,000 residents in 2024, Lake St. Louis ranks 214 of 272 — above 58 of the 271 other Missouri cities whose 2024 submission passes this site’s completeness test. That is -70.1% against the cohort median of 190.0. 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 8.6% of the 128 Part I offenses reported in Lake St. Louis for 2024, against a median of 13.6% across comparable Missouri cities — a gap of 5.0 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.
Property-offense composition
Larceny-theft is 88.0% of reported property offenses in Lake St. Louis, against a cohort median of 78.6%. The remainder is burglary (8) and motor vehicle theft (6). Composition differences of this size usually track what kinds of places and property are present in a jurisdiction.
Property counts dominate Lake St. Louis'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 11 reported violent incidents in a population of 19,334. 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 8.5 Census sq mi, Lake St. Louis logged 13.7 property and 1.3 violent offenses per square mile in 2024.
Lake St. Louis's 2024 book concentrates in larceny-theft (80% of 128 offenses; mix index 6,587).
Violent offenses are only 9% of the municipal total - a property-led book.
Lake St. Louis offense mix (2024)
Density uses Census Gazetteer land area (8.5 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 | 117 | 605.2 |
| Larceny-Theft | 103 | 532.7 |
| Burglary | 8 | 41.4 |
| Motor Vehicle Theft | 6 | 31 |
| Arson | 0 | 0 |
| Violent Crime | 11 | 56.9 |
| Aggravated Assault | 9 | 46.6 |
| Rape | 1 | 5.2 |
| Robbery | 1 | 5.2 |
| Murder | 0 | 0 |
Lead series · fell across 5 comparable years · FBI UCR
Secondary series · fell · 2020-2024 · FBI UCR
| Year | Coverage | Population | Violent Rate | Property Rate |
|---|---|---|---|---|
| 2020 | Comparable | 17,136 | 105 | 2305.1 |
| 2021 | Comparable | 17,469 | 188.9 | 1247.9 |
| 2022 | Comparable | 17,846 | 123.3 | 941.4 |
| 2023 | Comparable | 19,169 | 172.2 | 678.2 |
| 2024 | Comparable | 19,334 | 56.9 | 605.2 |
Lake St. Louis Police Department filed the 2024 UCR row behind Lake St. Louis's 128 reported offenses (5-year span 2020-2024).
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 Missouri cities closest to Lake St. Louis in population. Their populations run from 17,501 to 20,591, against 19,334 here. Or use our side-by-side compare tool to benchmark two cities directly.
Lake St. Louis sits at 56.9/100K violent (grade A); the Missouri cities below are the nearest matches after size peers are removed.
Lake St. Louis at 56.9/100K violent and 605.2/100K property - matched below outside Missouri (≥10k pop, latest UCR vintage; not the in-state lists above).
56.9/100K here; nearest out-of-state matches.
605.2/100K here; violent-rate peers above excluded.
In 2024, Lake St. Louis reported 11 violent crimes and 117 property crimes, for a total of 128 reported offenses.
From 2023 to 2024, Lake St. Louis's violent crime rate decreased by 67%, and the property crime rate decreased by 10.8%.
The most common crime type in Lake St. Louis is larceny-theft, accounting for 80.5% of all reported crimes (103 incidents in 2024).
Mid-size read: Lake St. Louis figures are FBI UCR CIUS Table 8 (vintage 2024), 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 Lake St. Louis's mid-size city row is sourced and ranked.
Source: FBI Uniform Crime Reporting (UCR) Program CIUS Table 8 municipal crime rates · 2024 Lake St. Louis, MO rates use the reporting-year population on the municipal row.
Bulk download: city crime dataset (CSV/JSON)
Every figure on PlainCrime is rendered directly from FBI Uniform Crime Reporting (UCR) source data, no number is typed in by an editor. Lake St. Louis is scored in the mid-size municipal band (19,334 on the row). See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.