2010 census

At the 2010 census there were 4,058 people, 1,700 households, and 1,102 families living in the city. The population density was 720.8 inhabitants per square mile (278.3/km²). There were 1,808 housing units at an average density of 321.1 per square mile (124.0/km²). The racial makup of the city was 97.6% White, 0.9% African American, 0.2% Asian, 0.4% from other races, and 0.8% from two or more races. Hispanic or Latino of any race were 1.3%.^[9]

Of the 1,700 households 29.4% had children under the age of 18 living with them, 55.3% were married couples living together, 6.5% had a female householder with no husband present, 3.0% had a male householder with no wife present, and 35.2% were non-families. 29.9% of households were one person and 14.2% were one person aged 65 or older. The average household size was 2.36 and the average family size was 2.94.

The median age was 40.6 years. 24.6% of residents were under the age of 18; 6.7% were between the ages of 18 and 24; 24.4% were from 25 to 44; 24.6% were from 45 to 64; and 19.6% were 65 or older. The gender makeup of the city was 48.5% male and 51.5% female.

2000 census

At the 2000 census there were 4,035 people, 1,578 households, and 1,117 families living in the city. The population density was 878.1 inhabitants per square mile (339.0/km²). There were 1,669 housing units at an average density of 363.2 per square mile (140.2/km²). The racial makup of the city was 98.71% White, 0.45% African American, 0.17% Pacific Islander, 0.12% Asian, 0.05% from other races, and 0.50% from two or more races. Hispanic or Latino of any race were 0.45%.^[10]

Of the 1,578 households 35.4% had children under the age of 18 living with them, 61.0% were married couples living together, 7.8% had a female householder with no husband present, and 29.2% were non-families. 25.7% of households were one person and 13.2% were one person aged 65 or older. The average household size was 2.52 and the average family size was 3.07.

28.0% are under the age of 18, 6.7% from 18 to 24, 29.1% from 25 to 44, 18.5% from 45 to 64, and 17.7% 65 or older. The median age was 36 years. For every 100 females, there were 91.2 males. For every 100 females age 18 and over, there were 88.8 males.

The median household income was $38,469 and the median family income was $45,625. Males had a median income of $29,674 versus $21,312 for females. The per capita income for the city was $17,195. About 4.6% of families and 4.8% of the population were below the poverty line, including 5.5% of those under the age of 18 and 8.4% of those 65 and older.

Primary and secondary schools

Beckman Catholic High School

All public school students living in Dyersville are zoned to schools in the Western Dubuque Community School District.^[11] Elementary school students attend Dyersville Elementary School (in Dyersville) for grades K-5.^[12] Dyersville Elementary opened in 2011. As of 2020 it has about 292 students.^[13] Middle school students are zoned to Drexler Middle School (in Farley), and high school students are zoned to Western Dubuque High School in Epworth.^[14]

The Basilica of St. Francis Xavier in Dyersville.

Dyersville also has private schools. Parochial school students attend St. Francis Xavier Elementary School for grades PreK-6 (enrollment 420), then go to Beckman Catholic High School for grades 7-12 (enrollment 280), both of which are in Dyersville.^[15] These schools are affiliated with the Roman Catholic Church, and are a part of the Roman Catholic Archdiocese of Dubuque.

Public libraries

James Kennedy Public Library

The municipal public library is the James Kennedy Public Library. In 1956 the city council proposed a standalone library to replace the collection at city hall, and on September 11, 1959 it was dedicated. In 1970 a children's library area was placed in a former fire station. The current library was formally named after its benefactor on March 1, 2001 and broke ground on April 1, 2001.^[16]