The larger "Rigby area" includes such outlying unincorporated communities as Annis, Garfield, Grant, Labelle, and Clark. Other nearby incorporated areas in Jefferson County include Menan, Roberts, Lewisville, and Ririe. If the populations of these communities is included, the number of people living in the "Rigby area" is somewhere above 5000.
Rigby is part of the Idaho Falls, Idaho Metropolitan Statistical Area, and is located directly between the two larger Idaho cities of Rexburg and Idaho Falls, providing its residents with a wide variety of shopping, entertainment and cultural choices. These neighboring towns are only about a 10-15 minute drive to the north and south, respectively. The Rigby area has seen recent population growth due to its residential taxes being less than that of Rexburg or Idaho Falls. Many Rigby citizens commute to jobs in Rexburg or Idaho Falls, and a number of residents work for the federal government or federal contractors through the Idaho National Laboratory INL, locally called "The Site".
As of the census of 2000, there were 2,998 people, 1,051 households, and 789 families residing in the city. The population density was 2,935.3 people per square mile (1,134.8/km²). There were 1,107 housing units at an average density of 1,083.9/sq mi (419.0/km²). The racial makeup of the city was 91.16% White, 0.43% African American, 0.87% Native American, 0.40% Asian, 0.07% Pacific Islander, 5.64% from other races, and 1.43% from two or more races. Hispanic or Latino of any race were 11.67% of the population.
There were 1,051 households out of which 42.8% had children under the age of 18 living with them, 60.2% were married couples living together, 11.7% had a female householder with no husband present, and 24.9% were non-families. 22.7% of all households were made up of individuals and 12.5% had someone living alone who was 65 years of age or older. The average household size was 2.83 and the average family size was 3.36.
In the city the population was spread out with 33.7% under the age of 18, 11.4% from 18 to 24, 24.2% from 25 to 44, 17.4% from 45 to 64, and 13.4% who were 65 years of age or older. The median age was 28 years. For every 100 females there were 91.8 males. For every 100 females age 18 and over, there were 88.2 males.
The median income for a household in the city was $30,192, and the median income for a family was $36,417. Males had a median income of $32,316 versus $18,269 for females. The per capita income for the city was $12,795. About 10.5% of families and 12.1% of the population were below the poverty line, including 13.2% of those under age 18 and 10.0% of those age 65 or over.