Wannian () is a county in the northeast of Jiangxi province, China. It is under the jurisdiction of the prefecture-level city of Shangrao.
Its total area is . Its 2003 population was .
Wannian County comprises 6 towns and 9 townships.
The county seat and largest population center is Chenying Town (). The second largest population center and former county seat is Qingyun Town (), formerly Chengguan Town ().
In addition to farming, pearl and concrete production are economically important. There is limited mining.
The local dialect, Wannianese, is a dialect of the Gan Chinese language.
At present, Wannian County has 6 towns and 6 townships.
Wannian is the location of the Xianren Cave (Fairy Cave), where historically important finds have been made of ancient pottery shards and rice grains.
Wannian is served by the AnhuiâÂÂJiangxi Railway.