Lawrence Waterbury II (March 31, 1877 – May 25, 1943) was an American champion polo player and society figure.

[1] Waterbury became a stockbroker and, reportedly, made a fortune in the 1907 bear market, also known as the Panic of 1907.

[1] Later, he was reported to have suffered great losses and in 1923, during an investigation of the so-called "Mammoth Syndicate", he was identified as one of the members who formed a group to "make a market" for the stock of Mammoth Oil, a subsidiary of Sinclair Oil Corporation.

[5] At the time of his death, he was the "only man to ever play every position in the international polo competition between Great Britain and the United States.

"[1] During World War I, he was a lieutenant in the United States Office of Naval Intelligence and later became a captain in the Chemical Warfare Section in France.