204 was a year of the Julian calendar, in the third century AD.

204 may also refer to:

• 204 BC, year of the pre-Julian Roman calendar, in the third century BC
• 204 (number)
• Peugeot 204, a small family car

• AS-204 (disambiguation)
• VA-204 (disambiguation)
• USS Nirvana II (SP-204), a United States Navy patrol vessel in commission from 1917 to 1918
• 204 Kallisto
• 204 (North Irish) Field Hospital
• M204 (disambiguation)
• No. 204 Squadron RAF
• Flight 204 (disambiguation)
• List of highways numbered 204

This disambiguation page lists articles associated with the title 204.
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