Bang Len (, ) is one of the six subdistricts (tambon) of Bang Yai District, in Nonthaburi Province, Thailand. The subdistrict is bounded by (clockwise from north) Bang Rak Yai, Bang Rak Noi, Bang Krang, Bang Khu Wiang, Bang Muang and Sao Thong Hin subdistricts. In 2020, it had a total population of 19,566 people.
The subdistrict is subdivided into 11 administrative villages (muban).
The area of the subdistrict is shared by two local administrative organizations.