Hissar (Arabic: حصار) means fort or castle in Arabic, with variants adopted into Persian (hesar, hessar) and Turkish (hisar).

Hissar, Hisar and Hesar may refer to:

• Hisar (city), a city in Haryana
  • Hisar Airport in Hisar city, Haryana
  • Hisar Junction railway station
  • Deer Park, Hisar a park in Hisar city
  • Hisar Urban Agglomeration
• Hisar (Lok Sabha constituency), of the lower house of the Parliament
• Hisar (Vidhan Sabha constituency), in the Haryana Legislative Assembly
• Hisar district, a district in Haryana
• Hisar division, a division of Haryana

• Gissar Range, mountain range in Tajikistan and Uzbekistan
  • Gissar Valley, in Tajikistan
• Hisor, a city in Tajikistan
• Hisor District, in Tajikistan

• Hesar, Afghanistan, a village
• Bala Hissar, Kabul, an ancient fortress in Kabul, Afghanistan
• Bala Hissar, Peshawar, an ancient fortress in Peshawar, Pakistan
• Puli Hisar District in Baghlan Province, Afghanistan

• Hesar, Iran (disambiguation), a list of places
• Hisar-e Sangi, a village
• Hisar Pain, a village
• Tepe Hissar, prehistoric site

• Hisar, Acıpayam
• Hisar, Emirdağ
• Hisar Mosque, an historic Mosque in İzmir
• Hisarlik, an archaeological site believed to have been Troy
• Anadoluhisarı, a fortress on the Bosporus in Istanbul, Turkey
• Rumelihisarı, a fortress in Istanbul

• Hisar Hill, a hill in southern Serbia
• Hisarya, Bulgaria, a resort town
• Demir Hisar (town), a town in North Macedonia

• Hesar (Iranian film)
• HISAR (surface to air missile system), developed in Turkey
• Hughes Integrated Synthetic Aperture Radar (HISAR), used on the US-developed RQ-4 Global Hawk drones

• All pages with titles containing Hissar
• Hesarak (disambiguation), places in Afghanistan and Iran