Thomas Farmer may refer to:

• Thomas Farmer (MP) (c.1546-1621), English MP for Norfolk
• Thomas Farmer (composer)
• Tom Farmer, Scottish entrepreneur
• Tom Farmer (American football)
• Thomas Fermore or Farmer, MP for Chipping Wycombe
• Thomas Fermor, MP

• Blackdog
• Black Dog (a.k.a. Ow, My Eye)
• Black Dog (a.k.a. Ow, My Eye) (That '70s Show)
• Black dog (disambiguation)
• Black Dog (film)
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• Black Dog Game Factory
• Black dog (ghost)
• Black Dog Halt railway station
• Black Dog & Leventhal
• Black Dog & Leventhal Publishers
• Black Dog (movie)
• Black Dog Publishing
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• Blackdom, New Mexico
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