RKB may refer to:

• Reichs Kolonial Bund
• Responder Knowledge Base
• RKB Mainichi Broadcasting
• Ro-Kyu-Bu!
• Rotary kelly bushing, a mechanical device used in drilling operations to rotate the drill string

• Kahrizeh-ye Mahmud Aqa
• Kahrizeh-ye Shakak
• Kahrizeh-ye Sheykhan
• Kahriz-e Jadid
• Kahriz-e Jamal
• Kahriz-e Jamal od Din
• Kahriz-e Kalan
• Kahriz-e Kamalvand
• Kahriz-e Khan Baba Khan
• Kahriz-e Khorramabad
• Kahriz-e Kur Bolagh
• Kahriz-e Kurbolaghi
• Kahriz-e Lotfi
• Kahriz-e Mayel Kandi
• Kahriz-e Now
• Kahriz-e Now, Razavi Khorasan
• Kahriz-e Olya
• Kahriz-e Olya (disambiguation)
• Kahriz-e Olya, Harsin
• Kahriz-e Olya, Kermanshah
• Kahriz-e Omar
• Kahriz-e Qaleh Daresi
• Kahriz-e Qal'eh Kohneh
• Kahriz-e Qaleh Kohneh
• Kahriz-e Safid