Lacona is a city in Warren County, Iowa, United States. The population was 361 at the 2010 census. It is part of the Des Moines–West Des Moines Metropolitan Statistical Area.
Lacona was laid out in 1856. It was incorporated in 1881.
Lacona is located at 41°11′20″N 93°23′04″W (41.188897, -93.384405).
According to the United States Census Bureau, the city has a total area of 0.36 square miles (0.93 km2), all of it land.
As of the census of 2010, there were 361 people, 152 households, and 102 families residing in the city. The population density was 1,002.8 inhabitants per square mile (387.2/km2). There were 165 housing units at an average density of 458.3 per square mile (177.0/km2). The racial makeup of the city was 99.7% White and 0.3% from two or more races. Hispanic or Latino of any race were 0.6% of the population.
There were 152 households, of which 32.9% had children under the age of 18 living with them, 55.3% were married couples living together, 10.5% had a female householder with no husband present, 1.3% had a male householder with no wife present, and 32.9% were non-families.