内华达试验场（英语：Nevada Test Site，NTS），又名内华达****区（英语：Nevada National Security Site，N2S2）是一个美国能源部设立在内华达州奈县东南部的专属区域，距拉斯维加斯西北约105公里。前身为1951年1月11日创建的内华达试验靶场（Nevada Proving Grounds）。该试验场面积为3500平方公里，地形主要为沙漠和山地。1951年1月27日在该试验场进行第一次核试验，位置在内华达试验场的法国人坪（Frenchman Flat），当量为1千吨（4.2 TJ）。美国政府曾在内华达试验场进行许多标志性的核试验。

The Nevada National Security Site (NNSS), previously the Nevada Test Site (NTS), is a United States Department of Energy reservation located in southeastern Nye County, Nevada, about 65 miles (105 km) northwest of the city of Las Vegas. Formerly known as the Nevada Proving Grounds, the site was established on 11 January 1951 for the testing of nuclear devices, covering approximately 1,360 square miles (3,500 km) of desert and mountainous terrain. Nuclear testing at the Nevada Test Site began with a 1-kiloton-of-TNT (4.2 TJ) bomb dropped on Frenchman Flat on 27 January 1951. Many of the iconic images of the nuclear era come from the NTS.