David Day

• David Day (Canadian writer), author from British Columbia
• David Day (historian), Australian historian
• David Day (broadcaster), Australian radio broadcaster, known as "Daisy"
• Dave Day (musician) of the punk band The Monks
• David Day (Minnesota politician), politician from Minnesota Territory
• David Day (Missouri politician), American former politician in the Missouri House of Representatives
• David A. Day (missionary), Lutheran missionary
• David F. Day, Union Army soldier and Medal of Honor recipient
• David V. Day, British theologian and academic
• David Van Day, English singer and media personality