Benjamin or Ben Allen may refer to:

• Benjamin Allen (British politician) (c. 1742–1791), British Member of Parliament for Bridgewater
• Benjamin Allen (clergyman) (1789–1829), American Episcopal clergyman
• Benjamin Allen (Wisconsin politician) (1807–1873), American lawyer, Civil War officer, and Wisconsin politician
• Benjamin F. Allen (1817–?), American lawyer and politician in the Florida House of Representatives
• Benjamin Allen (Canadian politician) (1830–1912), Canadian politician and retail merchant
• Benjamin Dwight Allen (1831–1914), American composer and organist
• Benjamin Allen (cartoonist) (1903–1971), American cartoonist
• Benjamin J. Allen (born 1947), American economist and university administrator
• Ben Allen (California politician) (born 1978), American lawyer and politician
• Ben H. Allen, American record producer, mixer, and songwriter

• Ben Allan (born 1968), Australian rules footballer
• Percy Allen (politician) (Percy Benjamin Allen, 1913–1992), New Zealand politician
• Allen (surname)