| Official Name: | Dumb Hundred, Pennsylvania |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Pennsylvania#USA |
| Pushpin Label: | Dumb Hundred |
| Pushpin Label Position: | top |
| Coordinates: | 40.3169°N -78.4106°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Pennsylvania |
| Subdivision Type2: | County |
| Subdivision Name2: | Blair |
| Subdivision Type3: | Township |
| Subdivision Name3: | Taylor |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 0.19 |
| Area Land Sq Mi: | 0.19 |
| Area Water Sq Mi: | 0.00 |
| Area Total Km2: | 0.49 |
| Area Land Km2: | 0.49 |
| Area Water Km2: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 84 |
| Population Footnotes: | [2] |
| Population Density Sq Mi: | 446.81 |
| Population Density Km2: | 172.12 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 1283 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 16673 (Roaring Spring) |
| Area Code: | 814/582 |
| Blank Name: | FIPS code |
| Blank Info: | 42-20214 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2805485 |
Dumb Hundred is an unincorporated community and census-designated place (CDP) in Blair County, Pennsylvania, United States. It was first listed as a CDP prior to the 2020 census.
The CDP is in southern Blair County, in the southwestern part of Taylor Township. It sits along Pennsylvania Route 867, which leads north to Roaring Spring and south to Interstate 99 at St. Clairsville.
Dumb Hundred is in the western part of the Morrisons Cove valley, with Dunning Mountain rising to the west.