As of the censusGR2 of 2000, there were 89,050 people, 33,511 households, and 21,044 families residing in the city. The population density was 3,177.7/km² (8,233.7/mi²). There were 34,637 housing units at an average density of 1,236.0/km² (3,202.6/mi²). The racial makeup of the city was 67.89% White, 10.55% African American, 0.37% Native American, 6.43% Asian, 0.09% Pacific Islander, 9.82% from other races, and 4.85% from two or more races. Hispanic or Latino of any race were 18.40% of the population.
There were 33,511 households out of which 32.5% had children under the age of 18 living with them, 39.7% were married couples living together, 17.6% had a female householder with no husband present, and 37.2% were non-families. 31.0% of all households were made up of individuals and 11.8% had someone living alone who was 65 years of age or older. The average household size was 2.62 and the average family size was 3.31.
In the city the population was spread out with 27.0% under the age of 18, 9.1% from 18 to 24, 31.0% from 25 to 44, 20.1% from 45 to 64, and 12.8% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 93.7 males. For every 100 females age 18 and over, there were 89.5 males.
The median income for a household in the city was $37,364, and the median income for a family was $45,295. Males had a median income of $34,284 versus $27,871 for females. The per capita income for the city was $17,492. About 13.2% of families and 16.5% of the population were below the poverty line, including 22.9% of those under age 18 and 14.6% of those age 65 or over.
Lynn has three public high schools (Lynn English, Lynn Classical, Lynn Vocational Technical Institute ["Lynn Tech"]), four junior high schools, two alternative schools, and 18 elementary schools. They are served by the Lynn Public Schools district. There is also an independent Catholic high school, St. Mary's High School, and three religious K-8 elementary schools, two Catholic and one interdenominational Christian.