David Caplan (born November 15, 1964) is a politician in Ontario, Canada. He is currently a member of the Legislative Assembly of Ontario, and is a cabinet minister in the government of Liberal Premier Dalton McGuinty. Caplan is the son of Elinor Caplan, who served as a cabinet minister at the federal and provincial levels. His father, Wilfred Caplan , was also a politician.

Caplan was born in Toronto, Ontario, and was educated at the University of Western Ontario. He worked as a commercial real estate agent with the firm of Ernest Goodman Ltd. from 1985 to 1989, and was Vice-President of Taurus Metal Trading Ltd. (a recycling company) between 1989 and 1992.

Caplan was elected as a trustee to the North York Board of Education in 1991 and served in this capacity for six years, becoming the Board's Vice-Chair in 1993. He also served on the Metro Toronto Board of Education from 1994 to 1997, becoming its Vice-Chair shortly before his departure for higher office.

In 1997, Elinor Caplan resigned her seat in the Ontario legislature to seek election to the Canadian House of Commons. David Caplan contested his mother's former riding of Oriole in the subsequent by-election, and defeated his Progressive Conservative opponent, former federal MP Barbara Greene , by a significant margin. He subsequently served as the Liberal critic for Youth and Training.

Ontario's electoral map was significantly altered in 1996, when Progressive Conservative Premier Mike Harris reduced the province's parliamentary representation from 130 to 103. These changes did not apply to by-elections for the sitting legislature, but came into effect for the provincial election of 1999. As a result, Caplan was forced to face another incumbent MPP, Minister of Education David Johnson, in the new riding of Don Valley East.

In one of the most closely-watched races of the campaign, Caplan defeated Johnson on election night by just over 3,000 votes. There are several public school teachers in Don Valley East, and many suspect that "strategic voting" by this group against the Tories was a leading factor in Caplan's victory. The Progressive Conservatives won the election, and Caplan became his party's Housing Critic and Deputy Whip.

Like his mother, David Caplan is a prominent politician in the Jewish community of the North York area. He did not, however, join with several other politicians from this community (including fellow Liberal MPP Monte Kwinter) to support provincial funding for non-Catholic religious schools in 2001. The initiative was brought forward by the Progressive Conservative government of Mike Harris, and the Liberal Party opposed it on the grounds that it would divert money from public schools. While Kwinter publicly disagreed with his party's position, Caplan supported it and referred to the Harris government's plan as "the first step toward a voucher system".

Caplan was easily re-elected in Don Valley East in the provincial election of 2003, defeating his Progressive Conservative opponent, former city councillor Paul Sutherland , by over 9000 votes. The Liberals won the general election, and Caplan was appointed to Cabinet on October 23, 2003 as Minister of Public Infrastructure Renewal and Deputy Government House Leader. In the former capacity, Caplan is responsible for coordinating "smart growth" urban strategies and combating the problems associated with urban sprawl as well as considering the introduction of Public-Private Partnerships for various government services.