Derek Armstrong may refer to:

• Derek Armstrong (ice hockey) (born 1973), Canadian ice hockey coach
• Derek Armstrong (footballer) (born 1939), English former footballer
• Derek Armstrong (gridiron football) (born 1981), Canadian football guard
• Derek Armstrong (politician) (born 1981), American politician

• Smokin' (Boston song)
• Smokin' (Charles Earland album)
• Smoking and Health
• Smoking ban order (Philippines)
• Smoking Cigarettes (song)
• Smoking combustible tobacco
• Smoking during pregnancy
• Smoking Education Act of 1984
• Smoking epidemiology
• Smoking Guns
• Smoking in Afghanistan
• Smoking in aircraft
• Smoking in Chicago
• Smoking in Cuba
• Smoking in East Timor
• Smoking in Hungary
• Smoking in Iraq
• Smoking in Korea
• Smoking in Korea (disambiguation)
• Smoking in Latvia
• Smoking in Northern Ireland
• Smoking in North Korea
• Smoking in Saudi Arabia
• Smoking in Scotland
• Smoking in South Africa