Blackrock can refer to:
- Blackrock (geology), a type of limestone
- BlackRock, an investment management firm based in New York City
Places:
- Blackrock, a village in County Dublin, Republic of Ireland
- Blackrock, County Louth is a town in County Louth, Republic of Ireland
- Blackrock, Cork is a suburb of Cork City, Republic of Ireland
- Blackrock, Monmouthshire in Monmouthshire, Wales
- Blackrock, New York, (sometimes referred to as 'Black Rock'), is a former town and now a neighborhood in the northwest part of Buffalo, New York
In fiction:
- In the World of Warcraft Universe:
- Blackrock Mountain
- Blackrock Spire
- Blackrock Depths
- Blackrock Realm
- Blackrock , a fictional chemical substance in the Ultima computer game series
- Blackrock (comics), an adversary of Superman's in DC Comics
- Blackrock (play), an Australian play
- Blackrock (film), an Australian movie
- G. B. Blackrock, a character in the Transformers comic book series
