Robert Blake is the name of:

• Robert Blake, brother to poet William Blake, who William claimed visited him in his dreams.
• Robert Blake (dentist) (1772–1822), a pioneering Irish dentist
• Rob Blake (b. 1969), a professional ice hockey player
• Robert Blake (actor) (b. 1933), an actor and the star of the Baretta television series
• Robert Blake (admiral) (1599–1657), an English military commander of the 17th Century
• Robert Blake (folksinger), a folksinger from the Pacific Northwest who recorded a split LP with Erik Peterson
• Robert Blake (Medal of Honor recipient), the first African-American to receive the Medal of Honor
• Robert Blake, Baron Blake (1916–2003), a noted British historian
• Robert Mertling-Blake, a computing journalist
• Robert O. Blake (b. 1921), an ambassador and diplomat
• Robert R. Blake (1918–2004), developer of the Managerial Grid Model

Robert Blake may also be a fictional character:

• Robert Harrison Blake, a character based on Robert Bloch from H. P. Lovecraft's short story "The Haunter of the Dark"
• A character from Bungie Studios' computer game Marathon 2: Durandal