Lansing (/ˈlænsɪŋ/) is the capital city of the U.S. state of Michigan. The most populous city in Ingham County, parts of the city extend into Eaton County and north into Clinton County. It is the sixth-most populous city in Michigan with a population of 112,644 at the 2020 census. The Lansing–East Lansing metropolitan area has an estimated 473,000 residents and is the third largest in the state after metropolitan Detroit and Grand Rapids. Lansing benefits from its central location within Mid-Michigan and serves as a regional hub for government, education, insurance and commerce.

Founded in 1835 and designated as Michigan's state capital in 1847, Lansing was selected for its more central location after concerns about Detroit's vulnerability to British attack in the War of 1812. The city's history is closely tied to the rise of industry in Michigan. In the late 19th and early 20th centuries, Lansing became a prominent center in the automobile industry. Oldsmobile and REO Motor Car Company, both founded by Ransom E. Olds, were among its most prominent manufacturers.

Lansing's economy is diverse, driven by state government operations, higher education, health care, and insurance. Neighboring East Lansing is home to Michigan State University, one of the largest and most prominent research universities in the U.S. Major companies based in the city include Jackson National Life and Auto-Owners Insurance. Cultural attractions include the Michigan State Capitol building, the Impression 5 Science Center, and Library of Michigan. Lansing is the only U.S. state capital (among the 47 located in counties) that is not also a county seat. The seat of government of Ingham County is Mason, but the county maintains some offices in Lansing.

The first recorded person of European descent to travel through the area that is now Lansing was British fur trader Hugh Heward and his French-Canadian team on April 24, 1790, while canoeing the Grand River. The land that was to become Lansing was surveyed as "Township 4 North Range 2 West" in February 1827 in what was then dense forest. It was the last of the county's townships to be surveyed, and the land was not offered for sale until October 1830. There would be no roads to this area for decades to come.

Historians have lamented the persistence of a myth about Lansing's founding.

The incorrect story of Lansing's beginnings states that in the winter of 1835 and early 1836, two brothers from New York plotted the area now known as REO Town just south of downtown Lansing and named it "Biddle City". This land lay in a floodplain and was underwater during the majority of the year. Nevertheless, the brothers went back to Lansing, New York, to sell plots for the town that did not exist. They told the New Yorkers this new "city" had an area of 65 blocks, a church and a public and academic square. 16 men bought plots in the nonexistent city, and upon reaching the area later that year found they were the victims of the scam. Many in the group, disappointed and now without funds to move on again, opted to stay and ended up settling around what is now metropolitan Lansing.

The story has persisted due to a 1904 newspaper article, which cited a memoir told by Daniel W. Buck, a respected Lansing mayor and son of one of the early pioneers. His story was cited in Michigan pioneer papers and retold in newspaper articles multiple times in the decades that followed. His characterization of the city as being born from a "land scam" was incorrect, though his story had some elements of truth as well.

The brothers were William and Jerry Ford. Although they were originally from New York, they were well-respected businessmen who hailed from Jackson and were instrumental during its earliest years.