Lambert Joseph Emmanuel Servais (11 April 1811 – 17 June 1890) was a Luxembourgian politician. He held numerous offices of national importance, foremost amongst which was in serving as the fifth Prime Minister of Luxembourg, for seven years, from 3 December 1867 until 26 December 1874.After being Prime Minister, he was a long-serving Mayor of Luxembourg City, holding office from soon after his departure from the premiership, in 1875, until his death, in 1890.