Wilhelmus Adrianus Franciscus Gabriël "Willem" Vermeend (born 21 December 1948) is a retired Dutch politician of the Labour Party (PvdA), academic, author and businessman.

Vermeend became a Member of the House of Representatives after Schelto Patijn was appointed as Queen's Commissioner of South Holland, taking office on 19 June 1984 serving as a frontbencher and spokesperson for Social security and Kingdom Relations.

The Cabinet Kok II resigned on 16 April 2002 following the conclusions of the NIOD report into the Srebrenica massacre during the Bosnian War and continued to serve in a demissionary capacity.

Vermeend retired from national politics and became active in the private sector and public sector and occupied numerous seats as a corporate director and nonprofit director on several boards of directors and supervisory boards (Mitsubishi Motors Europe, Randstad NV, AFAB Company, Royal Imtech N.V., Rotra Company, Free Record Shop, DSM Company, Maison van den Boer, Meeùs Group, Society for Statistics and Operations Research, SEO Economic Research and the Energy Research Centre) and served on several state commissions and councils on behalf of the government (Bureau for Economic Policy Analysis and the Social and Economic Council).

Vermeend is also a prolific author, having written more than a dozen books since 2002 about business, economics, finance, politics, tax law and computer security.