2020 census As of the
2020 census, Port Isabel had a population of 5,028 and 1,432 families residing in the city. The median age was 39.3 years; 26.4% of residents were under the age of 18 and 18.2% of residents were 65 years of age or older. For every 100 females there were 98.0 males, and for every 100 females age 18 and over there were 97.0 males age 18 and over. 99.5% of residents lived in urban areas, while 0.5% lived in rural areas. There were 1,798 households in Port Isabel, of which 35.9% had children under the age of 18 living in them. Of all households, 43.0% were married-couple households, 19.4% were households with a male householder and no spouse or partner present, and 30.3% were households with a female householder and no spouse or partner present. About 25.0% of all households were made up of individuals and 12.0% had someone living alone who was 65 years of age or older. There were 2,350 housing units, of which 23.5% were vacant. The homeowner vacancy rate was 2.6% and the rental vacancy rate was 8.4%.
2000 census As of the
census of 2000, there were 4,965 people, 1,649 households, and 1,225 families residing in the city. The population density was . There were 2,055 housing units at an average density of . The racial makeup of the city was 79.67%
White, 1.03%
African American, 0.33%
Native American, 0.25%
Asian, 0.10%
Pacific Islander, 15.54% from
other races, and 3.08% from two or more races. 74.39% of the population were
Hispanic or
Latino of any race. There were 1,649 households, out of which 36.0% had children under the age of 18 living with them, 53.1% were
married couples living together, 16.6% had a female householder with no husband present, and 25.7% were non-families. 22.1% of all households were made up of individuals, and 7.8% had someone living alone who was 65 years of age or older. The average household size was 2.95 and the average family size was 3.46. In the city, the population was spread out, with 30.4% under the age of 18, 9.9% from 18 to 24, 25.6% from 25 to 44, 21.8% from 45 to 64, and 12.2% who were 65 years of age or older. The median age was 32 years. For every 100 females, there were 94.1 males. For every 100 females age 18 and over, there were 93.5 males. The median income for a household in the city was $25,323, and the median income for a family was $26,077. Males had a median income of $17,105 versus $16,316 for females. The
per capita income for the city was $11,239. 27.3% of the population and 21.7% of families were below the
poverty line. 34.7% of those under the age of 18 and 14.3% of those 65 and older were living below the poverty line. ==Government and infrastructure==