A
- John Hicks Adams (1830–1878), Sheriff, Santa Clara County, California, Deputy U.S. Marshal, Arizona Territory
- Alfred Shea Addis, Territorial Marshal, Tucson, Arizona 1883-1886
- William "Red" Angus (1849–1922), Sheriff, Johnson County, Wyoming
- Gustave Lipman (1862–1953), Sheriff and Texas Ranger, Castro County, Texas
B
- Elfego Baca (1865–1945), New Mexico
- P.C. Baird (died 1928), Sheriff and Texas Ranger, Mason County, Texas
- Mariano Barela, Sheriff and U.S. Marshal, Mesilla, New Mexico
- Joel Almon Bascom (1832–1912), Chief of Police, Provo, Utah and constable of Mona, Utah
- John Watson Bell Bascom (1869–1948), Deputy Sheriff, Uintah County, Utah and constable of Naples, Utah
- Charlie Bassett (1847–1896), Sheriff of Ford County, Kansas, Marshal of Dodge City
- Johnny Behan (c. 1845–1912), Sheriff, Cochise County, Arizona Territory
- Horace Bell (1830-1918), Los Angeles Ranger
- James W. Bell (died 1881), Deputy Sheriff, Lincoln County, New Mexico
- Sam Bernard (1880–1964), Deputy Lincoln County, New Mexico, Hillsboro, New Mexico
- Charles Birkenfeld (c. 1910), Constable, Pima County, Arizona
- N. K. Boswell (1841-1904), Sheriff, Laramie, Wyoming
- William Breakenridge (1846–1931), Deputy Sheriff and U.S. Marshal, Cochise County, Arizona Territory
- William L. Brooks (1832–1874), Marshal, Newton, Kansas and Dodge City, Kansas
- Henry Newton Brown (1857–1884), Marshal, Tascosa, Texas (ghost town) and Caldwell, Kansas
- Neal Brown (born 1850), Assistant Marshal, Dodge City, Kansas; U. S. Marshal, Oklahoma Territory
- Seth Bullock (1849–1919), Sheriff, Lewis and Clark County, Montana; Sheriff, Lawrence County, South Dakota; U. S. Marshal Dakota Territory
C
- Mathew Caldwell (1798–1842), Gonzales Ranging Company of Mounted Volunteers 1836, Sheriff of Gonzales (Guadalupe, Dewitt, Caldwell, Lavaca) Counties 1837, Gonzales & Seguin Texas Rangers 1839
- Frank M. Canton (Joe Horner) (1849–1927), Sheriff, Johnson County, Wyoming; Deputy U.S. Marshal, Oklahoma Territory; Under Sheriff, Q County, Oklahoma
- James W. Carr (1845-1926), Marshal Silverton, Colorado; Marshal Rico, Colorado; Deputy Sheriff Ouray County, Colorado; Deputy Sheriff Dolores County, Colorado
- Charles Francis Colcord (1859–1934), Deputy U.S. Marshal, Oklahoma Territory; Chief of Police, Oklahoma, Oklahoma Territory
- David J. Cook (1842–1907), Marshal, Denver, Colorado
- Gary Cook NBC Tactical Response, RSO SO Presidential Advisor SWR
- George Washington Cook Sheriff Sierra County NM
- Robert Everett Cook, Warden New Mexico Penitentiary Pruitt NM
- Robert William Cook Shore Patrol USN 1945 San Francisco CA; Deputy Sheriff Sierra County NM; New Mexico State Police; Chief of Police, Grants NM
- "Longhair" Jim Courtright (1848–1887), Omaha, Nebraska Marshal, Marshal, Lake Valley, New Mexico; Sheriff, Fort Worth, Texas; Detective, Fort Worth, Texas
D
- Frank Dalton (1859–1887), Deputy US Marshal, Fort Smith, Arkansas, Oklahoma Territory
- Ben Daniels (1852-1923), US Marshal, Pima County, Arizona sheriff, superintendent of Yuma Territorial Prison
- James "Jim" M. Dodson (1876-1890), Prescott, Arizona City Marshal; Arizona State Penitentiary Wall Guard (post retirement)
- Ed Drew (1865-1911), Pinal County, Arizona deputy sheriff
E
- Morgan Earp (1851–1882), Deputy Sheriff, Ford County, Kansas; Marshal, Butte, Montana; U.S. Deputy Marshal, Arizona Territory; Deputy Policeman/Marshal, Arizona Territory
- Virgil Earp (1843–1906), Deputy Policeman and Assistant Marshal, Dodge City, Kansas; Deputy U.S. Marshal, Prescott, Arizona; Deputy U.S. Marshal, Tombstone, Arizona; Marshal/Chief of Police, Tombstone, Arizona; Sheriff, Colton, California; Deputy Sheriff Esmeralda County, Nevada
- Warren Earp (1855–1900), U. S. Deputy Marshal, Cochise County, Arizona Territory; Special Ranger (Arizona Cattleman's Association)
- Wyatt Earp (1848–1929), Constable, Lamar, Missouri; Marshal (for 1 hour), Ellsworth, Kansas; Deputy Policeman, Wichita, Kansas; Assistant Marshal, Dodge City, Kansas; Deputy Sheriff, Pima County, Arizona, Arizona Territory); Deputy Policeman and Assistant Marshal, Tombstone, Arizona, Arizona Territory; Deputy U.S. Marshal, Arizona Territory
F
G
H
- Lee Hall (1849–1911), Texas Ranger
- Wiley G. Haines (1860–1928), Undersheriff, County P, Oklahoma Territory; Deputy U.S. Marshal, Oklahoma Territory; Chief, Osage Indian Police
- John Coffee Hays (1817–1883), "Captain Jack", Captain in the Texas Rangers; first Sheriff of San Francisco (1850)
- Jack Helm (c. 1838–1873), Sheriff, DeWitt County, Texas
- James Butler "Wild Bill" Hickok (1837–1876), Marshal, Abilene, Kansas and Hays City, Kansas
- John Henry "Doc" Holliday (1851–1887), Special Police Officer, Tombstone, Arizona Territory; Deputy U.S. Marshal Arizona Territory
- John R. Hughes (1855–1947), Texas Ranger
- James B. Hume (1827–1904), Marshal, Placerville, California; Undersheriff, El Dorado County, California; Sheriff, El Dorado County, California; Chief Detective, Wells, Fargo & Co.
J
K
|
L
- John M. Larn (1849–1877), outlaw and Sheriff, Shackelford County, Texas
- James Franklin "Bud" Ledbetter (1852–1937), Deputy Sheriff, Johnson County, Arkansas; Deputy U.S. Marshal, Oklahoma Territory; Sheriff, Muskogee County, Oklahoma
- Isaiah W. Lees (1830–1902), Detective, San Francisco, California
- William Sidney "Cap" Light (1864–1893), Deputy Sheriff, Belton, Texas, Temple, Texas and Creede, Colorado
- Steve "Big Steve" Long (unk–1868), outlaw and Deputy Marshal, Laramie, Wyoming Territory
- Harry Love (1809–1868), Captain, California State Rangers (1853–1855)
M
- Chris Madsen (1851–1944), U.S. Marshal, Oklahoma Territory
- Bat Masterson (1853–1921), Deputy Sheriff/Sheriff Ford County, Kansas; Marshal, Trinidad, Colorado; U. S. Deputy Marshal, Dodge City, Kansas; Peace Commissioner/Deputy U.S. Marshal, Southern District of New York
- Ed Masterson (1852–1878), Marshal, Dodge City, Kansas
- James Masterson (1855–1895), Dodge City, Kansas, Ford County, Kansas, Ingalls, Kansas, Deputy U.S. Marshal
- Andrew "Andy" Mather (1851-1929), Texas Ranger, Williamson County, Texas, Co. E, Frontier Battalion, under Captain Maltby
- Joseph McNulty (1841-1909), Sheriff, Rooks County, Kansas
- Tolbert "Tol" Fannin McKinney (1857-1938), Lt. Texas Ranger, Co. D & E.; Frontier Battalion under Captains John R. Hughes & John H Rogers; Deputy Sheriff in Uvalde, Zavala, Bandera, Brewster, and El Paso Counties, Texas
- Leander H. McNelly (1844–1877), Texas Ranger
William H. "High Water Bill" Moorhead (1867-1870) First sheriff of Pembina County, Dakota Territory which also made him the first sheriff in what is now the State of North Dakota; also served as Pembina town marshal, and Pembina County deputy sheriff. Nick-named "High Water Bill" for his predictions on how high the flooding Red River of the North would get each spring, predictions that usually included the exchange of money and property.
N
- David Neagle (1847–1926), Deputy Sheriff, Cochise County, Arizona Territory; Marshal, Tombstone, Arizona Territory; Detective, US Marshal, San Francisco, California
- Evett Dumas Nix (1861-1946), US Marshal, Fort Smith, Arkansas, Nasty Nate, Kansas
O
P
R
- Alexander Ramsey (Old West lawman) (1847-1875), Marshall, Hays City, Kansas, later, Sheriff, Ellis County, Kansas, shot and captured Henry Born "Dutch Henry", shot and killed nine other outlaws in discharge of his duties
- Bass Reeves (1832–1910), Deputy U.S. Marshal, Indian Territory
- Porter Rockwell (1813–1878), Utah Territory
S
- George Scarborough (1859–1903), El Paso, Texas Sheriff, killed John Selman
- John Selman (1839–1896), El Paso, Texas Constable, killed John Wesley Hardin
- Charles Sims (1879–1945), Town Marshal Rosedale, Oklahoma
- Charlie Siringo (1855-1928), Pinkerton detective
- Sam Sixkiller (1842–1886), Captain, U.S. Indian Police, Indian Territory; Deputy U.S. Marshal, Indian Territory
- John Slaughter (1841–1922), Sheriff and Texas Ranger, Cochise County, Arizona, Arizona Territory
- Lot Smith (1830-1892), Sheriff Davis County, Utah; in March 1853, Farmington, then known as Little Cottonwood, was approved by Utah Territorial Legislature as the County seat of Davis County; a year later, Lot Smith, who also served in Mormon Battalion at age 16, was appointed county's first sheriff
- Thomas Smith (1830–1870), Marshal and Deputy U.S. Marshal, Kit Carson, Colorado and Abilene, Kansas
- Con Stapleton (1848–1879), Marshal, Deadwood, South Dakota
- Dallas Stoudenmire (1845–1882), El Paso, Texas Marshal and Texas Ranger; Deputy U.S. Marshal
- Michael Sughrue (1844–1901), Sheriff, Clark County, Kansas; Marshal Ashland, Kansas; Deputy Sheriff, Ford County, Kansas; Deputy Marshal, Dodge City, Kansas
T
- Henry Andrew "Heck" Thomas (1850–1912), Deputy U.S. Marshal, Oklahoma Territory
- Ben Thompson (1842–1884), Marshal, Austin, Texas
- Bill Tilghman (1854–1924), Deputy Marshal, Dodge City, Kansas; Deputy U.S. Marshal, Oklahoma Territory; Sheriff, Lincoln County, Oklahoma; Chief of Police, Oklahoma City, Oklahoma
- James Timberlake (1846-1891), Deputy Marshal, Liberty, Missouri; County Sheriff, Clay County, Missouri; Constable, Liberty, Missouri
- Paden Tolbert (1863–1904), Deputy U.S. Marshal, Indian Territory
V
W
- John Joshua Webb (1847–1882), Deputy Marshal, Dodge City, Kansas; Marshal, Las Vegas, New Mexico
- Franklin Pierce West, Indian Territory Deputy Marshal
- William Fletcher Wheeler (1824-1894), Montana Territory U.S. Marshal 1869-1878, Lt Col, 1st MN Vol Inf, 1858–61, Capt, Co F, 4th MN Inf, 1861-64 (WIA at Vicksburg, Mississippi), 3rd U.S. Marshal in the Montana Territory, 1869–78; founder of Montana Historical Society
- Fred White (1849–1880), Marshal Tombstone, Arizona Territory; died in the line of duty
- Robert Widdowfield (1846-1878), Wyoming Deputy sheriff, first Wyoming officer to be killed in the line of duty
- Robert Widenmann (1852-1930), Deputy U.S. Marshal New Mexico Territory
|
