David Day may refer to:
David Day (Canadian author) (born 1947), author from British Columbia David Day (historian) (born 1949), Australian historian David Day (broadcaster) (1951–2015), Australian radio broadcaster, known as "Daisy" David Day (cricketer) (1916–1944), English cricketer and British Army officer Dave Day (musician) (1941–2008) of the punk band The Monks David Day (Minnesota politician) (1825–1896), politician from Minnesota Territory David Day (Missouri politician) (born 1963), American former politician in the Missouri House of Representatives David A. Day (missionary) (1854–1897), Lutheran missionary David F. Day (1847–1914), Union Army soldier and Medal of Honor recipient David Talbot Day (1859–1925), American chemist and geologist David V. Day (born 1936), British theologian and academic David V. Day (psychologist), American industrial-organizational psychologist, academic, and author David Van Day (born 1956), English singer and media personality
See also Dave Days (born 1991), American musician