Teng County or Tengxian (; ) is a county of eastern Guangxi, China. It is under the administration of the prefecture-level city of Wuzhou. , it had a population of 1,125,264 residing in an area of . The county is divided into northern and southern parts by the Xun River.
Teng County was part of Baiyue areas until coming under Qin dynasty rule in 214 BC. In 583 AD, the county was called Yongping Commandery with its administrative seat established at Tengzhou. In 621, Yongping was renamed to Teng County.
On 21 March 2022, China Eastern Airlines Flight 5735 crashed in the county, killing all 132 people on board.
Teng County administers 15 towns and 2 townships.
Teng County is one of the largest titanium dioxide production bases in China, accounting for around 5% of the national output in 2013. It also has kaolinite resources, which are used for local ceramics production.
The total population in 2021 was 1,125,264. Ethnic minorities form 1.19% of the population, most of whom are Zhuang and Yao.