Spearfish Post Office (Old) · Photo: Magicpiano · CC BY-SA 4.0Who polices Mountain Plains, and what they report
Inside a 10-mile circle sit 3 graded neighbors. Mountain Plains has no police department of its own: it’s an unincorporated community (a census-designated place) in Lawrence County. The Lawrence County Sheriff’s Office reports to the FBI for the parts of the county without police of their own, so there are no figures for Mountain Plains alone, and no Safety Grade.
What stands out about safety in Mountain Plains
Policed by the county
Mountain Plains is a census-designated place, with no town government. Crimes there are reported to the FBI inside the Lawrence County Sheriff’s Office’s totals for the county. County police ↓
Counts, not rates
The FBI doesn’t publish how many people the Lawrence County Sheriff’s Office covers, so its totals can’t be turned into a per-resident rate or a grade for Mountain Plains. County police ↓
The nearest graded towns
The closest South Dakota towns with their own police figures are Spearfish (C, 3 mi), Deadwood (D, 9 mi), Lead (B+, 9 mi). Nearby towns can differ a lot from Mountain Plains. Nearest ↓
Written from the FBI data on this page. Figures are crimes reported to police, not convictions.
What the Lawrence County Sheriff’s Office reports
Reports to the FBI for the parts of Lawrence County without police of their own, which include Mountain Plains.
Property crimes
Violent crimes
2025 offenses reported by the Lawrence County Sheriff’s Office
Counts, not rates: the FBI doesn’t publish how many people each agency covers. FBI Uniform Crime Reporting, Tables 10–11.
Crimes reported to the FBI for the whole area the department covers, by year.
The nearest South Dakota towns with a Safety Grade
Straight-line distance from the center of Mountain Plains. Nearby towns can differ a lot from Mountain Plains.
Each town’s own police figures, per 1,000 residents a year, 2023–2025.
No one died in a crash on Mountain Plains’s roads in 2019–2023
That is about what is typical for South Dakota towns of 2,500–5,000 people: at their median rate (0.0 deaths per 100,000 residents a year), a town of Mountain Plains’s size would see about 0 in five years. With numbers this small, a death or two either way changes the picture, so Mountain Plains’s own rate (0.0) is context, not a ranking.
Deaths are counted where the crash happened, not where the people lived: a highway through town adds through-traffic deaths, and residents’ own risk on roads elsewhere isn’t here. Town rates sit below state and U.S. rates because a third of fatal crashes happen outside any town. Road safety is described here and is not part of the Safety Grade. Source: NHTSA Fatality Analysis Reporting System (FARS), 2019–2023.
Mountain Plains and its neighbors
| Town | Grade | Violent | Property |
|---|---|---|---|
| Spearfish | C | 2.3 | 19.1 |
Crimes reported to the FBI per 1,000 residents a year, 2023–2025.
How reported crime compares across the town line. Tap a town to see its safety page.
What this data can and can’t tell you
- It’s reported crime. Only incidents reported to and recorded by police appear here. Many crimes are never reported to police.
- A county agency covers a wide area. Its totals mix many communities, so they say little about any one of them.
- Gaps are real gaps. A missing year means the department didn’t report a full year, not that nothing happened.
How the grade is calculated, for every town: How TownRatings grades safety →
Questions about safety in Mountain Plains
Is Mountain Plains, SD safe?
There is no Safety Grade for Mountain Plains. The nearest South Dakota towns with a grade are Spearfish (C, 3 mi), Deadwood (D, 9 mi), Lead (B+, 9 mi).
Who polices Mountain Plains?
The Lawrence County Sheriff’s Office. Mountain Plains is an unincorporated community, and the department reports to the FBI for the parts of Lawrence County without police of their own.
Heads-up board
Your answer becomes a post in Town Square.
Please don’t name or describe individuals. In an emergency, call 911.
Neighbors looking out for each other in Mountain Plains.
Crime: FBI Uniform Crime Reporting Program, Crime Data Explorer: offenses known to law enforcement by city, and state and national rates. Counts are crimes reported to police, not convictions. The Safety Grade is our own summary of that data, not an official rating. Road deaths: NHTSA Fatality Analysis Reporting System (FARS), 2019–2023. This isn’t an official statement of public safety. In an emergency, call 911.