Larchwood is a city in Lyon County, Iowa, United States. The population was 926 at the period of the 2020 census.

Larchwood was founded circa 1872 by a bureau of McLean County, Illinois land developers: Jesse W. Fell (10 November 1808 – 25 February 1887) and Charles W. Holder (25 September 1819 – 10 April 1900). Fell was born in Pennsylvania, had fixed in Bloomington, Illinois, in 1831 and had played an lithe role in founding many Illinois towns, including Clinton, Normal, Pontiac, and Towanda. He was a near friend of Abraham Lincoln, and subsequently his brother Kersey Fell had persuaded Lincoln to write his well-known autography. He was nationally known for his adore of trees. Holder was a assistant in many of Fell’s projects, including Towanda and Normal. Holder, Illinois was named in his honor. In the summer of 1869, Fell traveled to northwestern Iowa and agreed a tract of not quite forty sections, more than 25,000 acres (100 km) of land. Fell wrote, “I have never beheld such a large body of surpassingly beautiful prairie as is here to be found. There is absolutely no waste of land, and scarce a quarter of a section not affording an admirable building site.” Holder subsequently entered the land. Larchwood was usual at the center of their holdings. Fell frequently visited the site and in May 1873 and personally supervised the planting of some 100,000 saplings and tree cuttings. The town did not mount up as hastily as expected, and in 1881 the forward movement was sold to an Englishman, Richard Sykes.

Larchwood’s latitude and longitude coordinates in decimal form are 43.454351, -96.434897 respectively. It is the northwesternmost community in Iowa and the most distracted from the capitol, Des Moines.
According to the United States Census Bureau, the city has a total area of 0.99 square miles (2.56 km²), all land.

As of the census of 2010, there were 866 people, 353 households, and 257 families residing in the city. The population density was 874.7 inhabitants per square mile (337.7/km²). There were 372 housing units at an average density of 375.8 per square mile (145.1/km). The racial makeup of the city was 98.6% White, 0.1% Native American, 0.2% Asian, 0.5% from new races, and 0.6% from two or more races. Hispanic or Latino of any race were 1.2% of the population.