Adolf Georg Olland (13 April 1867 – 22 July 1933) was the leading Dutch chess master in the time before Max Euwe.

[1] Olland took 3rd at Amsterdam 1887 (Dirk van Foreest won); shared 1st at Amsterdam 1889 (Hauptturnier); took 2nd, behind Rudolf Loman, at Utrecht 1891; took 5th at Groningen 1893 (Loman won); took 2nd, behind Loman, at Rotterdam 1894; shared 1st at Arnheim 1895; took 2nd at Amsterdam 1899 behind Henry Ernest Atkins; took 2nd, behind Rudolf Swiderski, at Munich 1900 (12th DSB–Congress, Hauptturnier).

He shared 1st with Abraham Speijer at Leiden 1909 (1st NED-ch); took 4th at Stockholm 1912 (8th Nordic-ch, Alexander Alekhine won); took 3rd at Scheveningen 1913 (Alekhine won).

He defeated most Dutch players except Euwe who beat him twice, but lost to foreign masters such as Géza Maróczy, Richard Réti, and Edgar Colle.

Olland died of a heart attack playing in the 1933 Dutch Championship at The Hague.