Eagle is located at 43°41′35″N 116°20′47″W (43.693093, -116.346366), at an elevation of 2,566 feet (782 m) above sea level.
According to the United States Census Bureau, the city has a total area of 29.40 square miles (76.15 km2), of which, 28.92 square miles (74.90 km2) is land and 0.48 square miles (1.24 km2) is water.
This region experiences warm to hot, dry summers, and cold, dry winters, with summer high temperatures averaging 85 °F and winter low temperatures averaging 25.6 °F. According to the Köppen climate classification system, Eagle has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.
As of the census of 2010, there were 19,908 people, 7,069 households, and 5,585 families residing in the city. The population density was 688.4 inhabitants per square mile (265.8/km2). There were 7,570 housing units at an average density of 261.8 per square mile (101.1/km2). The racial makeup of the city was 94.4% White, 0.3% African American, 0.5% Native American, 1.6% Asian, 0.1% Pacific Islander, 1.0% from other races, and 2.0% from two or more races. Hispanic or Latino of any race were 4.7% of the population.
There were 7,069 households of which 41.5% had children under the age of 18 living with them, 67.9% were married couples living together, 7.9% had a female householder with no husband present, 3.2% had a male householder with no wife present, and 21.0% were non-families. 17.7% of all households were made up of individuals and 8.5% had someone living alone who was 65 years of age or older. The average household size was 2.82 and the average family size was 3.20.
The median age in the city was 40.6 years. 30.8% of residents were under the age of 18; 5.4% were between the ages of 18 and 24; 21.3% were from 25 to 44; 30.3% were from 45 to 64; and 12.1% were 65 years of age or older. The gender makeup of the city was 49.1% male and 50.9% female.
As of the census of 2000, there were 11,085 people, 3,864 households, and 3,098 families residing in the city. The population density was 1,206.3 people per square mile (465.7/km²). There were 4,048 housing units at an average density of 440.5 per square mile (170.1/km²). The racial makeup of the city was 95.90% White, 0.37% African American, 0.47% Native American, 0.74% Asian, 0.13% Pacific Islander, 0.59% from other races, and 1.80% from two or more races. Hispanic or Latino of any race were 2.63% of the population.
There were 3,864 households out of which 45.9% had children under the age of 18 living with them, 69.4% were married couples living together, 7.6% had a female householder with no husband present, and 19.8% were non-families. 16.1% of all households were made up of individuals and 5.3% had someone living alone who was 65 years of age or older. The average household size was 2.87 and the average family size was 3.23.
In the city, the population was spread out with 32.6% under the age of 18, 5.6% from 18 to 24, 31.1% from 25 to 44, 23.1% from 45 to 64, and 7.6% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 100.7 males. For every 100 females age 18 and over, there were 95.5 males.
The median income for a household in the city was $65,313, and the median income for a family was $71,907. Males had a median income of $50,962 versus $29,066 for females. The per capita income for the city was $27,226. About 4.0% of families and 3.8% of the population were below the poverty line, including 4.9% of those under age 18 and 3.5% of those age 65 or over.
Eagle is within the West Ada School District and is home to one high school (Eagle High School, opened 1995), one alternative high school (Eagle Academy), one middle school (Eagle Middle School), and three elementary schools (Eagle Elementary School of the Arts, Eagle Hills Elementary School, and Seven Oaks Elementary School). Seven Oaks provides a year-around option for students in grades K-5. There is one Kindergarten through 8th grade math and science magnet (Galileo Math & Science Magnet). There are also two charter schools (North Star Charter School, Rolling Hills Charter School), one Seventh-Day Christian school, and one private arts school (Fresco Arts Academy).Arboretum Park
Eagle Island State Park
The 2008 NBC reality television show The Baby Borrowers was filmed in Eagle.Larry Craig, former U.S. Senator from Idaho
Taylor Kelly, former quarterback for Arizona State University
George Kennedy, Academy Award–winning actor
Jerry Kramer, former NFL guard with the Green Bay Packers (1958–68)
Raúl Labrador, Member of the United State House of Representatives
Jeb Putzier, NFL tight end for the Seattle Seahawks
Derek Schouman, NFL tight end for the Buffalo Bills