Relampago first appeared as a
census designated place in the
2000 U.S. census.
2020 census As of the
census of 2000, there were 104 people, 36 households, and 29 families residing in the CDP. The population density was . There were 44 housing units at an average density of . The racial makeup of the CDP was 93.27%
White, 6.73% from
other races.
Hispanic or
Latino of any race were 96.15% of the population. There were 36 households, out of which 38.9% had children under the age of 18 living with them, 52.8% were
married couples living together, 27.8% had a female householder with no husband present, and 19.4% were non-families. 16.7% of all households were made up of individuals, and 16.7% had someone living alone who was 65 years of age or older. The average household size was 2.89 and the average family size was 3.28. In the CDP, the population was spread out, with 23.1% under the age of 18, 7.7% from 18 to 24, 29.8% from 25 to 44, 23.1% from 45 to 64, and 16.3% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 85.7 males. For every 100 females age 18 and over, there were 66.7 males. The median income for a household in the CDP was $17,250, and the median income for a family was $62,891. Males had a median income of $0 versus $28,182 for females. The
per capita income for the CDP was $9,207. There were 18.5% of families and 38.3% of the population living below the
poverty line, including 51.7% of under eighteens and 66.7% of those over 64. ==Education==