RSN

The initials RSN may refer to:

• "Real Soon Now"
• Regional sports network
• Renal Support Network
• Republic of Singapore Navy
• Resort Sports Network
• Robust Security Network in IEEE 802.11i-2004 (WPA2)
• Royal School of Needlework
• Royal Saudi Navy
• RSN Racing & Sport

RSn may refer to:

• Organotin chemistry and related compounds