De Graaf is a Dutch occupational surname. With over 21,000 people, it was the 24th most common name in the Netherlands in 2007. In modern Dutch de graaf means the count, but in the past it also referred to the head of the municipal council called schepen. A common variant form is De Graaff, with 4632 people in 2007. In Belgium, the form De Graef is most common, with 1017 people in 2018.

People with the surname include:Aad de Graaf (1939–1995), Dutch track cyclist

Aileen de Graaf, Dutch darts player

Anne de Graaf, American-born Dutch children's writer, journalist and translator

Annelotte de Graaf, Dutch pop singer-songwriter known as "Amber Arcades"

Arie de Graaf, Dutch PvdA politician

Beatrice de Graaf, Dutch historian and terrorism expert

Door de Graaf (1920–2011), British-Dutch resistance member and translator who worked for the Special Operations Executive, later a campaigner for mental health support in the Netherlands.

Edwin de Graaf, Dutch footballer

Elles de Graaf, Dutch trance-singer

Esmee de Graaf, Dutch football forward

Fred de Graaf, Dutch VVD politician

H. J. de Graaf (1899–1984), Dutch historian of Java

Hermine de Graaf (1951–2013), Dutch novelist

Isaak de Graaf (1668–1743), Dutch map maker

Ivar de Graaf, Dutch drummer

Jaan de Graaf, Dutch footballer

Jeffrey de Graaf, Dutch born Swedish darts player

Laurens de Graaf (c.1653–1704), Dutch pirate, mercenary, and naval officer

Lawrence B. de Graaf, American historian

Louw de Graaf (1930–2020), Dutch CDA politician

Machiel de Graaf, Dutch politician and physical therapist

Nan Dirk de Graaf, Dutch sociologist

Peter DeGraaf, American (Kansas) politician

Regnier de Graaf (1641–1673), Dutch physician and anatomist who discovered Graafian follicles and G-spot

Reinier de Graaf, Dutch architect

Thom de Graaf, Dutch jurist and D66 politician, Deputy Prime Minister of the Netherlands

Willem de Graaf, Dutch-born New Zealand footballerDe GraaffBart de Graaff (1967–2002), Dutch television presenter, comedian and creator

Christian de Graaff, Botswana Minister of Agriculture

Dieuwke de Graaff-Nauta (1930–2008), Dutch politician

Gerrit de Graaff (1931–1996), South African zoologist after whom the De Graaff's Soft-furred Mouse is named

James de Graaff-Hunter (1881–1967), British-born geodesist

Jan de Graaff (1943–2014), Dutch television journalist

Johannes de Graaff (1729–1813), Dutch Governor of Sint Eustatius; first to salute an American ship

Liesbeth Pascal-de Graaff, Dutch rower

Marcel de Graaff, Dutch politician

Rein de Graaff, Dutch jazz pianist

Sander de Graaf, Dutch rower

Simon de Graaff (1861–1953), Dutch Minister of Colonies 1919–1925

Suzanna Catharina de Graaff (1905–1968), Dutch Romanov impostor

Willem de Graaff (1923–2004), Dutch astronomer after whom the asteroid 10964 Degraaff is named

Wim de Graaff (1931–2021), Dutch speed skaterDeGraafDavid DeGraaf, American Handball player

Ken DeGraaf, American politician from ColoradoDeGraffGeoffrey DeGraff, birth name of American Buddhist monk Ṭhānissaro Bhikkhu