阿塔富环礁是南太平洋的环礁，由新西兰的自治领托克劳管辖，长6.5公里、宽5.5公里，土地面积2.5平方公里，潟湖面积15平方公里，2006年人口524。

• History and map
• Satellite image

Atafu, formerly known as the Duke of York Group, is a group of 42 coral islets within Tokelau in the south Pacific Ocean, 500 kilometres (310 miles) north of Samoa. Covering 2.5 square kilometres (1.0 square mile), it is the smallest of the three islands that constitute Tokelau, and is composed of an atoll surrounding a central lagoon, which itself covers some 15 km². The atoll lies some 800 kilometres (500 miles) south of the equator at 8° 35' South, 172° 30' West.