Lawrence Karl Davidson, CNZM (born in Dargaville, 1927), is a New Zealand sailing yacht designer. He is most notable for his International America's Cup Class sailboats which successfully challenged and defended the America's Cup sailing trophy.
In the 2000 New Year Honours, Davidson was made a Companion of the New Zealand Order of Merit, for services to yacht designing.
He was inducted into the America's Cup Hall of Fame in 2007.
After leaving school he qualified as an accountant and worked in that profession until in 1969 he joined Morely Sutherland's boat building company at Greenhithe. In 1970 Tony Bouzaid commissioned the Blitzkrieg a half-ton yacht designed by Davidson. Davidson captained it to win the inaugural New Zealand Half Ton Championship. Encouraged by this success Davidson bought an Olivetti computer and with software sourced from Sparkman and Stephens and began using the computer to design yachts. He was subsequently the first New Zealand yacht designer to hold the IOR rule on computer.
in 1976 Davidson designed Fun, a trailerable Quarter Ton yacht.
In 1976 Davidson designed Waverider for Tony Bouzaid, which won the 1978 Half Ton Cup held at Poole, England. In reaction to the success of the light displacement designed of Davidson, Bruce Farr and Paul Whiting, the IOR bought in new rules which required extensive surgery of Waverider to bring her into class for the 1979 Half Ton Cup series, which Waverider won, becoming the first yacht to ever win the Half Ton Cup twice.
After the success of Waverider. John MacLaurin commissioned Pendragon a Three-Quarter-tonner development of and big sister to Waverider. Built lightly in wood by Ocean Racing Yachts in Auckland, Pendragon won the Three-Quarter Ton cup held in 1978 in Vancouver, British Columbia. In the following year it won the One Ton Cup held at Newport, Rhode Island, a feat which was not achieved by any other yacht in level rating competition.