| Official Name: | Blacktail, North Dakota |
| Settlement Type: | Census-designated place |
| Pushpin Map: | North Dakota#USA |
| Pushpin Label: | Blacktail |
| Coordinates: | 48.4328°N -103.74°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | North Dakota |
| Subdivision Type2: | County |
| Subdivision Name2: | Williams |
| Subdivision Type3: | Township |
| Subdivision Name3: | Blacktail |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 0.57 |
| Area Land Sq Mi: | 0.33 |
| Area Water Sq Mi: | 0.23 |
| Area Total Km2: | 1.47 |
| Area Land Km2: | 0.86 |
| Area Water Km2: | 0.61 |
| Population As Of: | 2020 |
| Population Density Km2: | 71.02 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 2090 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 58801 (Williston) |
| Area Code: | 701 |
| Blank Name: | FIPS code |
| Blank Info: | 38-07456 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2805286 |
| Population Total: | 61 |
| Unit Pref: | Imperial |
| Population Density Sq Mi: | 183.73 |
Blacktail is an unincorporated community and census-designated place (CDP) built around Blacktail Lake in Williams County, North Dakota, United States. It was first listed as a CDP prior to the 2020 census.
The CDP is in northwestern Williams County, in the north-central part of Blacktail Township. It consists of residences built on the shore of Blacktail Lake, a small reservoir built on Blacktail Creek, a southeast-flowing tributary of the Little Muddy River, which flows south to the Missouri River at Williston, south of Blacktail.
It is in the Williston Basin School District 7. Williston High School is the zoned high school.
It was formerly in the Williams County School District 8 (formerly New School District).[2] The district only served grades K-8 and high school students were sent to Williston High, then in the Williston Public School District 1.[3] District 8 also sent high school students to the Nesson School District in Ray and to the Tioga School District in Tioga.[4] In 2021 District 8 merged with District 1 into the Williston Basin School District 7.[5]