noun

• A rocking or balanced stone.
• (US, northeastern dialects) A marsh.
• A town in Ayrshire, Scotland, from lagan (“dell”).
• A Scottish habitational surname from Scottish Gaelic, from the town in Ayrshire.
• A surname from Irish, a variant of Lohan.
• A male given name transferred from the surname. Used since at least the 19th century, and popular in the 2000s.
• A female given name transferred from the surname, of 1990s and later usage; much less common than the male name.
• A number of places in the United States:
• A city, the county seat of Cache County, Utah; named for the river rising in the Bear River Mts.
• A neighborhood of Philadelphia, Pennsylvania.
• A city, the county seat of Hocking County, Ohio; named for Mingo leader Chief Logan.
• A city, the county seat of Logan County, West Virginia; named for Chief Logan.
• A city, the county seat of Harrison County, Iowa; named for Union Army general John A. Logan.
• A village in New Mexico.
• A city in Kansas; named for John A. Logan.
• A river in the United States; flowing from the Bear River Mountains in Idaho into the Little Bear River at Benson, Utah.
• An unincorporated community in Dearborn County, Indiana; named for nearby Logan Creek.
• An unincorporated community in Lawrence County, Indiana.
• An unincorporated community in Greene County, Missouri; named for a local family.
• An unincorporated community in Lawrence County, Missouri; named for landowners William and Hetty E. Logan.
• An unincorporated community in Montana; named for Capt. William Logan, who participated in the campaign against American Indians in Montana.
• An unincorporated community in Nebraska.
• An unincorporated community in Wisconsin.
• A number of townships in the United States, listed under Logan Township.
• A locality in Victoria, Australia.
• A river in Queensland, Australia; flowing from near Mount Barney into the Moreton Bay at Woongoolba.
• The City of Logan, a local government area in south-east Queensland, Australia. named after Patrick Logan.