Radu IV the Great

{{More citations needed|date=December 2009}}

{{Infobox royalty

| name = Radu IV the Great

| title = Voivode of Wallachia

| image = 027 - Radu cel Mare cu doamna sa.jpg

| caption = Radu IV the Great and his wife, Catalina Crnojević of Zeta

| succession = Voivode of Wallachia

| reign = 15 September 1495 – 23 April 1508

| reign-type = Reign

| predecessor = Vlad IV Călugărul

| successor = Mihnea cel Rău

| birth_name =

| birth_date = 1467

| birth_place =

| death_date = 23 April 1508

| death_place =

| burial_place =

| spouse = Doamna Catalina Crnojević of ZetaDaughter of Andrija Crnojević

| issue = Radu V of Afumați
Radu VI Bădica
Radu VII Paisie
Mircea V the Shepherd
Vlad Vintilă de la Slatina
Cărstina of Wallachia
Ana of Wallachia
Boba of Wallachia

| house = House of Drăculești

| father = Vlad IV Călugărul

| mother = Doamna Rada Smaranda

| religion = Eastern Orthodox Church

| burial_date =

}}

Radu IV the Great ({{langx|ro|Radu cel Mare}}), (1467 – 23 April 1508) was a Voivode (Prince) of Wallachia from September 1495 to April 1508. He succeeded his father, Vlad Călugărul, who was one of the three brothers to Vlad III the Impaler ({{langx|ro|Vlad Țepeș}}). He was married to Princess Catalina Crnojević of Zeta (sometimes spelled as Katarina or Jekaterina), daughter of Andrija Crnojević. The marriage was arranged by her uncle Ivan Crnojević, Prince of Zeta after her father's death. Radu was succeeded by his first cousin Mihnea cel Rău, son to his uncle Vlad Țepeș.

He is credited, along with Church officials, for introducing the printing press to Wallachia.{{Cite web |last=Erich |first=Agnes |date=2010 |title=The Appearance of Printing Activity in the Romanian Space: an Integral Part of a European Phenomenon |url=https://www.academia.edu/66545583 |access-date=6 March 2024 |website=academia.edu}}