Mister Brown or Mr. Brown is a term used for male persons whose surname is Brown.

Mister Brown can also refer to:

• John Brown (servant), Scottish personal attendant and favourite of Queen Victoria for many years
• mrbrown, Lee Kin Mum, a Singaporean blogger
• "Mr. Brown", the code name used by Peter Macari during his 1971 Qantas bomb hoax
• A pseudonym of William Makepeace Thackeray

• Mr. Brown, the character played by Quentin Tarantino in Reservoir Dogs
• Deacon Leroy Brown, a character in the TV show Meet the Browns
• Mr Henry Brown, character in the Paddington Bear fictional universe
• Mr Brown/Jeremy Brown, the English teacher in the British show Mind Your Language

• Mr. Brown Coffee, a Taiwanese coffee brand
• "Mr. Brown", a song from Styles of Beyond's Megadef
• Mr. Brown (album), an album by Sleepy Brown
• "Mr. Brown" (song), a song by Bob Marley

• List of people with surname Brown
• Mrs. Brown (disambiguation)