Aleksey Mironovich Yachmenev (1866-1937) was an Aleut chief who lived in Unalaska. Along with Leontiy Sivstov, Yachmenev accompanied Waldemar Jochelson on his 1909-1910 ethnological studies on the Aleut.

His son, John Yatchmeneff, wrote down the texts for John P. Harrington's 1941 work on the Aleut language.