The name Longmont originates from the view of Long's Peak available from the city.
As of the census of 2000, there are 71,093 people, 26,667 households, and 18,453 families residing in the city. The population density is 1,259.7/km² (3,262.3/mi²). There are 27,394 housing units at an average density of 485.4/km² (1,257.0/mi²). The racial makeup of the city is:
In the city the population is spread out with 27.9% under the age of 18, 8.5% from 18 to 24, 33.1% from 25 to 44, 21.3% from 45 to 64, and 9.2% who are 65 years of age or older. The median age is 34 years. For every 100 females there are 97.9 males. For every 100 females age 18 and over, there are 95.6 males.
The median income for a household in the city is $51,174, and the median income for a family is $58,037. Males have a median income of $40,978 versus $29,582 for females. The per capita income for the city is $23,409. 7.8% of the population and 5.9% of families are below the poverty line. Out of the total people living in poverty, 10.6% are under the age of 18 and 6.2% are 65 or older.