Fred Warren (1907–1986) was a Welsh association footballer. Fred Warren or Frederick Warren may also refer to:

• Frederick Warren (1775–1848), Royal Navy vice-admiral
• Frederick Wilson Warren (1887–1959), Canadian architect and politician
• Frederick A. Warren (c. 1878–1944), South Dakota Supreme Court justice
• E. Alyn Warren (1874–1940), American actor sometimes known as "Fred Warren"
• Freddie Warren (footballer, born 1992), English footballer