The becquerel (symbol: Bq) is the SI derived unit of radioactivity, named after Henri Becquerel.

Becquerel may also refer to:

• Becquerel family, a family of French scientists
  • Antoine César Becquerel (1788–1878)
  • Alexandre-Edmond Becquerel (1820-1891)
  • Henri Becquerel (1852-1908), Nobel laureate and namesake of the term becquerel
  • Jean Becquerel (1878-1953)
  • Louis Alfred Becquerel (1814-1862)

• 6914 Becquerel, asteroid
• Becquerel (lunar crater)
• Becquerel (Martian crater)

• Becquerel, a dog in the web comic Homestuck
• Becquerel effect, alternative name for the photo-voltaic effect
• Becquerel Prize, prize for contributions to photovoltaic research
• Becquerel Rays, the original name given to radioactivity
• Becquerelite, a uranium mineral