The population of Emmaus was 11,313 at the 2000 census. In 2007, Emmaus was listed as one of the top 100 "Best Places to Live" in the United States by Money magazine.
As of the census of 2000, there were 11,313 people, 4,985 households, and 3,155 families residing in the borough. The population density was 3,918.8 people per square mile (1,511.4/km²). There were 5,186 housing units at an average density of 1,796.4/sq mi (692.8/km²). The racial makeup of the borough was 95.89% White, 0.70% African American, 0.06% Native American, 1.81% Asian, 0.03% Pacific Islander, 0.88% from other races, and 0.63% from two or more races. Hispanic or Latino of any race were 1.51% of the population.
There were 4,985 households out of which 26.4% had children under the age of 18 living with them, 50.9% were married couples living together, 9.1% had a female householder with no husband present, and 36.7% were non-families. 31.5% of all households were made up of individuals and 13.6% had someone living alone who was 65 years of age or older. The average household size was 2.26 and the average family size was 2.85.
In the borough, the population was spread out with 21.2% under the age of 18, 6.6% from 18 to 24, 31.0% from 25 to 44, 22.1% from 45 to 64, and 19.1% who were 65 years of age or older. The median age was 40 years. For every 100 females, there are 91.7 males. For every 100 females age 18 and over, there were 88.8 males.
The median income for a household in the borough was $44,181, and the median income for a family was $54,120. Males had a median income of $38,659 versus $25,331 for females. The per capita income for the borough was $23,245. About 2.2% of families and 3.5% of the population were below the poverty line, including 1.2% of those under age 18 and 7.9% of those age 65 or over.