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Lannon, Wisconsin
Location of Lannon in Waukesha County, Wisconsin.
Location of Lannon in Waukesha County, Wisconsin.
Country  United States
State  Wisconsin
County Waukesha
 • Total 2.49 sq mi (6.45 km2)
 • Land 2.47 sq mi (6.40 km2)
 • Water 0.02 sq mi (0.05 km2)
915 ft (279 m)
 • Total 1,107
 • Estimate 
 • Density 498.38/sq mi (192.41/km2)
Time zone UTC-6 (Central (CST))
 • Summer (DST) UTC-5 (CDT)
FIPS code 55-42450
GNIS feature ID 1567839

Lannon is a village in Waukesha County, Wisconsin, United States. The population was 1,107 at the 2010 census. Lannon is a part of the Milwaukee metropolitan area.


The village is named for William Lannon, who settled here with his bride in 1834. Lannon is what Lannon stone, a type of limestone or dolomite, is named for, as it was quarried here.

Lannon stone

John Halquist built one of the state's largest stone companies from Lannon stone first in Sussex, Wisconsin and then in multiple locations.

Lannon stone was the major source of stone for many cities in Wisconsin and was a major source for Chicago, too. It was widely used to provide a stone veneer on bridges.

Lannon stone is variously asserted to be limestone distinct from dolomite, or to be limestone which is also known as dolomite.

Menonomee Park has been named as an excellent place to photograph Lannon stone.


Lannon is located at 43°9′1″N 88°9′52″W / 43.15028°N 88.16444°W / 43.15028; -88.16444 (43.150288, -88.164568).

According to the United States Census Bureau, the village has a total area of 2.46 square miles (6.37 km2), of which, 2.44 square miles (6.32 km2) of it is land and 0.02 square miles (0.05 km2) is water.


Historical population
Census Pop.
1930 434
1940 378 −12.9%
1950 438 15.9%
1960 1,084 147.5%
1970 1,056 −2.6%
1980 987 −6.5%
1990 924 −6.4%
2000 1,009 9.2%
2010 1,107 9.7%
2019 (est.) 1,232 11.3%
U.S. Decennial Census

2010 census

At the 2010 census, there were 1,107 people, 479 households and 314 families living in the village. The population density was 453.7 per square mile (175.2/km2). There were 517 housing units at an average density of 211.9 per square mile (81.8/km2). The racial make-up was 94.8% White, 1.0% African American, 0.6% Native American, 0.5% Asian, 1.7% from other races and 1.4% from two or more races. Hispanic or Latino of any race were 4.0% of the population.

There were 479 households, of which 26.5% had children under the age of 18 living with them, 48.6% were married couples living together, 10.0% had a female householder with no husband present, 6.9% had a male householder with no wife present, and 34.4% were non-families. 29.2% of all households were made up of individuals, and 8.8% had someone living alone who was 65 years of age or older. The average household size was 2.31 and the average family size was 2.82.

The median age was 43.2 years. 21.1% of residents were under the age of 18; 5.7% were between the ages of 18 and 24; 25.4% were from 25 to 44; 33.1% were from 45 to 64; and 14.7% were 65 years of age or older. The gender make-up was 50.1% male and 49.9% female.

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