ISTR may refer to:

• IstR RNA, a family of non-coding RNA
• The International Society for Third-Sector Research

• Gold Medal of the Royal Canadian Geographical Society
• Gold Medal of the Royal Geographical Society
• Gold Medal of the Royal Scottish Geographical Society
• Gold Medals
• Gold (metallic)
• Gold (metallic gold)
• Gold Metro Station
• Gold (Metro Station EP)
• Goldmine (Colbie Caillat Song)
• Goldmine (Colbie Caillat song)
• Goldmine (Kimbra song)
• Goldminemag.com
• Goldmine (New Girl)
• Gold Mine (novel)
• Gold Mine Saloon
• Goldmine (song)
• Gold mining in Afghanistan
• Gold mining in Africa
• Gold mining in Bolivia
• Gold mining in Botswana
• Gold mining in Burkina Faso
• Gold mining in Cambodia
• Gold mining in Cameroon
• Gold mining in Colombia
• Gold mining in Ecuador