Frederick, Crown Prince of Denmark may refer to:

• Frederick, Hereditary Prince of Denmark (1753–1805), heir presumptive from 1766 to 1768
• Frederick IV of Denmark (1671–1730), King of Denmark and Norway, Crown Prince from 1671 to 1699
• Frederick V of Denmark (1723–1766), King of Denmark and Norway, Crown Prince from 1730 to 1746
• Frederick VI of Denmark (1768–1839), King of Denmark and Norway, Crown Prince from 1768 to 1808
• Frederick VII of Denmark (1808–1863), King of Denmark, Crown Prince from 1839 to 1848
• Frederick VIII of Denmark (1843–1912), King of Denmark, Crown Prince from 1863 to 1906
• Frederik IX of Denmark (1899–1972), King of Denmark, Crown Prince from 1912 to 1947
• Frederik X (born 1968), King of Denmark, Crown Prince from 1972 to 2024