| Official Name: | Dukedom |
| Settlement Type: | Unincorporated community |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Name1: | and |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Graves (Kentucky) and Weakley (Tennessee) |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 489 |
| Pushpin Map: | Kentucky#USA |
| Pushpin Label Position: | bottom |
| Coordinates: | 36.4992°N -88.715°W |
| Postal Code Type: | ZIP Code |
| Postal Code: | 38226 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1283116 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 103 |
| Unit Pref: | Imperial |
| Area Footnotes: | [2] |
| Area Total Km2: | 4.84 |
| Area Total Sq Mi: | 1.87 |
| Area Land Km2: | 4.83 |
| Area Water Km2: | 0.01 |
| Area Land Sq Mi: | 1.86 |
| Area Water Sq Mi: | 0.00 |
| Population Density Sq Mi: | 55.23 |
| Population Density Km2: | 21.32 |
Dukedom is an unincorporated community in both Graves County, Kentucky and Weakley County, Tennessee, straddling the state line in the western part of both states. The location is 36.5022°N -88.715°W; The elevation is 487 feet above sea level.[3]
The community is notable as the location of the Knob Creek Church of Christ, established in June 1834, the first Restoration Movement congregation to adopt the name Church of Christ.
A post office was established on the Tennessee side in 1833.[4] The community probably derives its name from Duke A. Beadles, first postmaster.[5]
Dukedom is connected with General Nathan Bedford Forrest, who served for the Confederacy in the Civil War. A Kentucky highway historical marker in the community reads:
CSA Gen. N. B. Forrest with main body of cavalry passed this way before and after destructive raid on Paducah, March 25, 1864. Returning, Kentucky regiments, camping near here, given leave to seek food, horses, get recruits, visit families. Not one deserted. News item led Forrest to send men back through here again, April 14, to capture horses missed before.[6]