Mundelein is a village in Lake County, Illinois, United States and a northern suburb of Chicago. Per the 2020 census, the population was 31,560, making this the fourth largest town in Lake County. The village straddles Libertyville Township and Fremont Township, and borders Grayslake, Ivanhoe, Diamond Lake, and Libertyville. The village lies 33 miles northwest of the Chicago Loop.
Mundelein was first settled by European settlers in 1835, and was incorporated in 1909 after a spur line connected the village to the Chicago North Shore and Milwaukee Railroad. The University of Saint Mary of the Lake opened in 1921, and in June 1926 the village hosted the closing events of the 28th International Eucharistic Congress, bringing hundreds of thousands of people to the village. Its name was changed four times over its history, including two after incorporation.
History
Pre-incorporation Native Americans of the area, such as the Potawatomi people, were trading with French trappers as early as 1650. The Potwatomi had settled on a camp on the south end of Diamond Lake. Natives lost possession of land in the area in 1836 and were forced west of the Mississippi River. Peter Shaddle was the first European settler in 1835, and built a log cabin, finally acquired by University of Saint Mary of the Lake. Shaddle sold his claim to settlers from New York.
Later settlers from England named the town "Mechanics Grove", due to the settler's occupations of millwrights, wheelwrights and carpenters. The town's first school opened in 1837 and a church the following year.
The town name changed to "Holcomb" in the early 1850s, for a settler named John Holcomb. He migrated from New York in 1847 and was a civic and spiritual leader in the community through his participation in the Methodist Episcopal Church and for his service in township offices. In 1885, he donated 20 acres of land to the Wisconsin Central Railroad. The same year, the town was renamed after American businessman William Rockefeller Jr., who was a major stockholder in the Wisconsin Central Railroad. Rockefeller was incorporated on February 1, 1909,Killackey, p. 2 in a referendum in anticipation of an economic boom after the Chicago North Shore and Milwaukee Railroad built a spur line terminating at Rockefeller in 1904. Residents from nearby Diamond Lake, Illinois were included in the vote in order to meet the minimum resident requirements, although they later withdrew from the village.
Post-incorporation 1909 to 1925 The village was renamed from Rockefeller to "Area" in July 1909. The name was from a sales school in the village called Sheldon School, which had the motto of "Ability, Reliability, Endurance, and Action". In 1909, Sheldon had purchased of land for the construction of the school. His property contained a lake named Mud Lake, which was dammed and renamed Lake Eara. Sheldon had opened another business school in Chicago in 1902. Classes first began at the school in 1910, with students from Nicaragua, Australia, Mexico, and Germany. At its peak, the school had over 10,000 students. Sheldon's business failed, with the Electronic Encyclopedia of Chicago suggesting that the failure was a result of World War I. Sheldon sold his estate to the Archbishop of Chicago George Mundelein to open University of Saint Mary of the Lake in 1921.
On December 10, 1924, the Village Board held a special meeting with representatives from the Soo Line Railroad, who requested that the board change the village's name to Mundelein for the cardinal. The Illinois Secretary of State approved in April 1925, and the board passed an ordinance changing the village name to Mundelein.
28th International Eucharistic Congress The closing events for the 28th International Eucharistic Congress were held at the University of Saint Mary of the Lake on June 24, 1926. Approximately half a million people appeared, including 10,000 nuns, 8,000 priests, 390 bishops, 64 archbishops, and 12 cardinals. Trains brought people to the village every 30 minutes before mass.Killackey, p. 44 A temporary terminal was built at the future site of Carmel High School to accommodate the events. It existed until the Great Depression. 18,000 cars went through Mundelein on that day, and thousands of National Guard troops were sent to control traffic for the event. In total, 820 trains went through the Mundelein station from dawn to midnight on that day.
Two events were scheduled for the Seminary, a Solemn Pontifical Mass at 10:00 am, and a Procession at 2:00 pm. During the procession, a violent thunderstorm passed the seminary, leaving people at the procession "tired and soaked to the skin". The seminary was left with litter and damaged lawns after the event.
Since 1930 Floods in 1936 and 1937 severely damaged the village. The first flood occurred on September 27, 1936, after 1.33 inches of rain fell onto the village, damaging businesses. The second occurred in June 1937, flooding the village's main road and causing further damage to adjacent neighborhoods and businesses.Killackey, p. 48
By the 1970s, the community was largely residential with a little light industrial development.Encyclopædia Britannica Vol. VII, p. 100 Ranches and tri-level houses were built in the 1950s and 1960s in the center of town, with larger, two-story houses in the village's periphery built from the 1970s.
A major employer of the village, Ball Glass, closed in the early 1980s. The village saw economic and industrial growth during the 1990s, gaining over 10,000 residents between the 1980 and 1990 United States census.
Mundelein greatly expanded in size in 2022 with the annexation of over 700 acres of land owned by the Wirtz family; the owners of the Chicago Blackhawks. The plan was to develop 1,200 houses and 600 townhomes there.
In January 2026, the Audubon Council of Illinois designated it an Illinois Bird City.
Geography Mundelein is located northwest of the Chicago Loop. According to the 2021 census gazetteer files, Mundelein has a total area of , of which (or 95.95%) is land and (or 4.05%) is water. Mundelein borders Hawthorn Woods and Vernon Hills to the south and east, and is primarily located within the Indian Creek watershed in Lake County.
Climate Under the Köppen climate classification, Mundelein is a Humid continental climate zone (Dfa) under the hot summer subtype with cold winters and warm to hot summers. Since 1999, the record high was 103 °F in July 2012 during the 2012 North American heat wave, while the record low was -26 °F in January 2019 during the January–February 2019 North American cold wave.
Diamond Lake
Diamond Lake is a 153-acre glacial lake in south Mundelein. It is primarily used for fishing and swimming and has been settled by Europeans since the 19th-century. The maximum depth of the lake is 23.56 feet, with an average depth of 7.65 feet. The lake is primarily used for swimming, fishing, and boating, and drains into the Des Plaines River.
Demographics
Racial and ethnic composition +Mundelein village, Illinois – racial and ethnic compositionRace / Ethnicity (NH = Non-Hispanic)Pop 2000Pop 2010% 2000% 2010White alone (NH)20,56618,12316,43166.48%58.34%52.06%Black or African American alone (NH)4644166011.50%1.34%1.90%Native American or Alaska Native alone (NH)2028210.06%0.09%0.07%Asian alone (NH)2,0252,7193,4926.55%8.75%11.06%Native Hawaiian or Pacific Islander alone (NH)10670.03%0.02%0.02%Other race alone (NH)2538800.08%0.12%0.25%Mixed race or Multiracial (NH)3383908361.09%1.26%2.65%Hispanic or Latino (any race)7,4879,34410,09224.20%30.08%31.98%Total30,93531,06431,560100.00%100.00%100.00%
2020 census As of the 2020 census, Mundelein had a population of 31,560. The population density was . There were 11,967 housing units at an average density of .
The median age was 38.8 years. 22.9% of residents were under the age of 18 and 14.8% of residents were 65 years of age or older. For every 100 females there were 100.9 males, and for every 100 females age 18 and over there were 99.1 males age 18 and over.
100.0% of residents lived in urban areas, while 0.0% lived in rural areas.
There were 11,417 households and 8,209 families in Mundelein, of which 33.9% had children under the age of 18 living in them. Of all households, 57.9% were married-couple households, 15.3% were households with a male householder and no spouse or partner present, and 21.6% were households with a female householder and no spouse or partner present. About 21.5% of all households were made up of individuals and 8.8% had someone living alone who was 65 years of age or older.
Of the housing units, 4.6% were vacant. The homeowner vacancy rate was 1.2% and the rental vacancy rate was 7.7%.
Income and poverty The median income for a household in the village was $91,535, and the median income for a family was $102,531. Males had a median income of $50,025 versus $36,522 for females. The per capita income for the village was $39,003. About 4.9% of families and 6.9% of the population were below the poverty line, including 14.3% of those under age 18 and 4.0% of those age 65 or over. Government Mundelein's government consists of a board of trustees of made up of six members and a mayor. The current mayor of Mundelein is Robin Meier, who was elected in early 2025.
Fire department The fire department of Mundelein is called the Mundelein Fire Department, and before 1956, the Mundelein-Countryside fire Department Corporation. The first fire station in Mundelein was opened in 1947 south of the downtown area, being initially built with four bays, but later expanded to six bays. The department had no full-time employees until 1960. Five additions were added to the station between 1952 and 1961, including a second story to the building. The department moved into its current building on Midlothian Road in 2000.Killackey, pp. 6869, 7475
Cardinal Mundelein donated the village its first new fire truck, a 1925 Stoughton. The fire truck was officially turned over to the village at a ceremony held at the St. Mary of the Lake Seminary on July 17, 1925. The fire truck, nicknamed "Old No. 1", was restored in 2008.
Law enforcement Mundelein Police Department is the law enforcement agency of Mundelein. Initially stationed in the now-demolished village hall with a one-man police force, the department got its own police station in 1964 on Seymour Avenue and Division Street, before moving into its current building in 2002. The site of the original station is now a water retention area.Killackey, pp. 7879
Parks The park district of Mundelein is the Mundelein Parks and Recreation District. The organization won three awards in October 2021 from the Illinois Association of Park Districts, two of which were from business partnerships. The district runs an outdoor pool named Barefoot Bay. The park district opened in 1954 and manages over 700 acres and over 30 parks.
Post Office
The first post office of Mundelein was established in 1887, in a building which is now used a store. The current facility was opened in 1976 across from the location of the former village hall.Killackey, p. 120
Places
Mundelein Heritage Museum Mundelein Heritage Museum is a museum owned by the Mundelein Historical Commission. The museum opened in 1983 in a train facility, which been intended for the Soo Line Railroad in the 1920s. The Historical Society of Fort Hill Country, founded in 1983, previously ran the museum as the Fort Hill Museum, until the society disbanded in 2018 due to low membership. The museum was closed from 2018 to 2020, as operations of the museum were transferred to the Mundelein Historical Commission.
Memorial Point