Maciej Tadeusz Grabowski (born 2 March 1978 in Gdynia) is a Polish sailor, who specialized in the Laser class.

[1] He had an impressive track record of two career European titles, and finished only in the top 16 in three editions of the Olympic Games (2000, 2004, and 2008), representing his nation Poland.

[2][5] At the 2004 Summer Olympics in Athens, Grabowski finished the Laser regatta steadily from a poor start to take the eleventh place overall with 125 points, trailing behind Spain's Luis Martínez by a five-point shortfall.

Although he performed poorly at the 2007 ISAF World Championships, Grabowski had secured a selection on the Polish team through the assistance of IOC's Olympic Solidarity scholarship.

[2][8] Unlike two of his previous Games, Grabowski failed to improve his Olympic feat with a surprising sixteen-place finish in a fleet of forty-three sailors at the end of ten-race series, giving him only a grade of 131.