Cousins William L. Wiley (1820–1900) and James Wiley (1817–1886) founded Galva in 1854.[4] The name Galva honors the Swedish immigrants of nearby Bishop Hill and refers to Gävle, Sweden which is the town's sister city. Today around 80% of the town has Scandinavian ancestry.[5]
As of the 2020 census[3] there were 2,470 people, 1,148 households, and 683 families residing in the city. The population density was 896.55 inhabitants per square mile (346.16/km2). There were 1,254 housing units at an average density of 455.17 per square mile (175.74/km2). The racial makeup of the city was 93.36% White, 0.93% African American, 0.12% Native American, 0.20% Asian, 0.00% Pacific Islander, 0.36% from other races, and 5.02% from two or more races. Hispanic or Latino of any race were 2.91% of the population.
There were 1,148 households, out of which 23.8% had children under the age of 18 living with them, 46.17% were married couples living together, 11.24% had a female householder with no husband present, and 40.51% were non-families. 39.02% of all households were made up of individuals, and 15.77% had someone living alone who was 65 years of age or older. The average household size was 2.95 and the average family size was 2.21.
The city's age distribution consisted of 23.2% under the age of 18, 4.8% from 18 to 24, 21.4% from 25 to 44, 28.6% from 45 to 64, and 22.0% who were 65 years of age or older. The median age was 46.0 years. For every 100 females, there were 98.4 males. For every 100 females age 18 and over, there were 100.4 males.
The median income for a household in the city was $44,191, and the median income for a family was $65,913. Males had a median income of $44,935 versus $27,288 for females. The per capita income for the city was $25,796. About 14.3% of families and 19.5% of the population were below the poverty line, including 44.3% of those under age 18 and 5.5% of those age 65 or over.
^"Station: Galva, IL". U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991–2020). National Oceanic and Atmospheric Administration. Retrieved July 11, 2021.