A **centralized state law enforcement model** consolidates all statewide policing (patrol, investigation, traffic, specialty units) under **a single agency**—typically a "State Police" or "Department of Public Safety"—rather than splitting functions between a Highway Patrol and a separate Bureau of Investigation.
| State | Agency Name | Notes |
|---|---|---|
| Alaska | Alaska State Troopers (DPS) | Includes wildlife, rural patrol |
| Connecticut | Connecticut State Police | Oldest (1903); full service |
| Delaware | Delaware State Police | Full service |
| Hawaii | Hawaii State Sheriff (DPS) | Unique: sheriff-based state police |
| Idaho | Idaho State Police | Full service |
| Illinois | Illinois State Police | Full service |
| Indiana | Indiana State Police | Full service |
| Iowa | Iowa State Patrol (DPS) | Patrol + DCI (investigations) under DPS |
| Kentucky | Kentucky State Police | Full service |
| Louisiana | Louisiana State Police | Full service |
| Maine | Maine State Police | Full service |
| Maryland | Maryland State Police | Full service |
| Massachusetts | Massachusetts State Police | Full service (merged 1992) |
| Michigan | Michigan State Police | Full service |
| Minnesota | Minnesota State Patrol (DPS) | Patrol + BCA (investigations) under DPS |
| Mississippi | Mississippi Highway Patrol (DPS) | Patrol + BCI under DPS |
| Missouri | Missouri State Highway Patrol | Patrol + divisions; effectively unified |
| Montana | Montana Highway Patrol (DOJ) | Patrol + DCI under DOJ |
| Nebraska | Nebraska State Patrol | Full service |
| New Hampshire | NH State Police (DOS) | Full service |
| New Jersey | New Jersey State Police | Full service |
| New York | New York State Police | Full service |
| North Carolina | NC State Highway Patrol (DPS) | Patrol + SBI under DPS |
| North Dakota | ND Highway Patrol | Patrol + BCI (AG) — hybrid |
| Ohio | Ohio State Highway Patrol | Patrol-focused; BCI separate (AG) |
| Oklahoma | Oklahoma Highway Patrol (DPS) | Patrol + OSBI separate — hybrid |
| Oregon | Oregon State Police | Full service |
| Pennsylvania | Pennsylvania State Police | Full service; largest (4,500+ sworn) |
| Rhode Island | Rhode Island State Police | Full service |
| South Carolina | SC Highway Patrol (DPS) | Patrol + SLED (investigations) separate |
| South Dakota | SD Highway Patrol (DPS) | Patrol + DCI under DPS |
| Tennessee | Tennessee Highway Patrol (DPS) | Patrol + TBI separate — hybrid |
| Texas | Texas Highway Patrol (DPS) | Patrol + Rangers + CID under DPS — unified dept |
| Utah | Utah Highway Patrol (DPS) | Patrol + BCI under DPS |
| Vermont | Vermont State Police | Full service |
| Virginia | Virginia State Police | Full service |
| Washington | Washington State Patrol | Patrol-focused; WSP = traffic/criminal; WASPC coordinates |
| West Virginia | West Virginia State Police | Full service |
| Wisconsin | Wisconsin State Patrol (DOT) | Traffic-focused; DOJ-DCI investigations |
| Wyoming | Wyoming Highway Patrol | Patrol + DCI (AG) — hybrid |