Outlier is a statistical term.
Outlier or outliers can also refer to:
- Outlier (album), by Twelve Foot Ninja
- Outlier, an album by Kingdom Come
- Outlier (ballet), by Wayne McGregor
- Outlier Peak, a mountain in Canada
- Outlier (TV series), Norwegian TV crime drama broadcast in 2020
- Outliers (book), by Malcolm Gladwell
- Exclave, a geopolitical term
- Polynesian outlier, culturally Polynesian islands which lie in Melanesia and Micronesia
- Inliers and outliers (geology), a geological term
- Anomaly detection in data mining