noun

• (countable) A surname.
• (uncountable) A placename, from the surname:
• A city, the county seat of Montgomery County, Ohio; named for Jonathan Dayton, a Constitution signatory and statesman.
• A census-designated place in Lyon County, Nevada, United States; named for John Day, a local surveyor.
• A city, the county seat of Rhea County, Tennessee; named for the city in Ohio.
• A city in Texas.
• A census-designated place in New Jersey; named for Jonathan Dayton.
• A city in Kentucky; named for the city in Ohio.
• A city in Minnesota; named for founder Lyman Dayton.
• A town in Waupaca County, Wisconsin; named for early settler Lyman Dayton.
• A suburb of Perth, Western Australia; named for Walter Warner Day, a cattle and wine pioneer in the area.
• A city in Oregon.
• A city, the county seat of Columbia County, Washington; named for Jesse Day.
• A town in Maine; named for Thomas Day, who submitted the petition for the area to become a town.
• A town in New York.
• A town in Indiana.
• A town in Virginia.
• A city in Iowa; named for the city in Ohio.
• A town in Wyoming; named for founder Joe Dayton Thorne.
• A town in Richland County, Wisconsin.
• A borough of Pennsylvania.
• A city in Idaho.
• A community in Nova Scotia.
• A census-designated place in Montana.
• A town in Alabama.