加兹尼（波斯语：غزنی‎，中国宋朝《诸番志》作吉慈尼）是阿富汗东部一城市，加兹尼省省会，位于海拔2219米的高原上，接近巴基斯坦边界，人口约141000人，塔吉克斯坦族占50%，普什图族占25%，哈扎拉族占20%，另有少部分印度人。喀布尔在其东北。

加兹尼古为佛教中心，683年为阿拉伯帝国攻占，从此伊斯兰化。在994年至1160年间，以加兹尼为首都的伽色尼王国强盛一时，其领土范围最大时包括今巴基斯坦、阿富汗、大呼罗珊和波斯，伊斯兰教即是通过伽色尼王国的征战而传入北印度的。

1151年，加兹尼被古尔王朝首次攻陷，1173年，该城成为古尔王朝的陪都，1221年被窝阔台率领的蒙古帝国大军攻占并彻底屠杀和毁坏，其后虽然得以重建，但从此再也未能恢复到原有的繁盛。

Ghaznī (Pashto:غزني‎, Persian:غزنی‎‎) or Ghaznai (غزنی), also historically known as Ghaznīn (غزنين) or Ghazna (غزنه), is a city in Afghanistan with a population of over 150,000 people. It is located in the central-east part of the country. Situated on a plateau at 7,280 feet (2,219 m) above sea level, the city serves as the capital of Ghazni Province. It is linked by a highway with Kandahar to the southwest, Kabul to the northeast, and Gardez and Khost to the east. The foundation stone of Ghazni Airport was laid in April 2012 which now serves Ghazni and other nearby eastern Afghan provinces.