Blackrock can refer to:

• Blackrock (geology), a type of limestone
• BlackRock, an investment management firm based in New York City

Places:

• Blackrock, Dublin, 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