Caspar Mathias Spoo (7 January 1837 – 17 March 1914) was a Luxembourgish industrialist and politician. Spoo was born in Echternach in 1837. His parents were workers in the earthenware factory, and died early. He joined the civil service from a young age, to make a living for himself and his siblings. He gave up his position in the postal service in order to open the Société Duchscher Frères et Spoo with André Duchscher, his old friend. From 1886, he worked for two years as an accountant at the Dudelange foundry; he then struck out on his own in 1888 to open an ironmongery in Esch-Alzette with a workshop constructing ovens, cauldrons, etc.: the Maschinenfabrik Spoo & Co.