2010 census

As of the census^[2] of 2010, there were 3,945 people, 1,328 households, and 994 families living in the city. The population density was 1,678.7 inhabitants per square mile (648.1/km²). There were 1,428 housing units at an average density of 607.7 per square mile (234.6/km²). The racial makeup of the city was 89.5% White, 0.2% African American, 0.9% Native American, 0.5% Asian, 0.2% Pacific Islander, 6.7% from other races, and 2.1% from two or more races. Hispanic or Latino of any race were 11.8% of the population.

There were 1,328 households, of which 45.3% had children under the age of 18 living with them, 57.0% were married couples living together, 13.3% had a female householder with no husband present, 4.5% had a male householder with no wife present, and 25.2% were non-families. 21.8% of all households were made up of individuals, and 9% had someone living alone who was 65 years of age or older. The average household size was 2.91 and the average family size was 3.43.

The median age in the city was 27.6 years. 34.3% of residents were under the age of 18; 10.3% were between the ages of 18 and 24; 28.5% were from 25 to 44; 16.5% were from 45 to 64; and 10.3% were 65 years of age or older. The gender makeup of the city was 47.4% male and 52.6% female.

2000 census

As of the census^[9] of 2000, there were 2,998 people, 1,051 households, and 789 families living in the city. The population density was 2,935.3 inhabitants per square mile (1,133.3/km²). There were 1,107 housing units at an average density of 1,083.9 per square mile (418.5/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.

Climate

According to the Köppen climate classification, Rigby has a warm-summer humid continental climate (Dfb).

According to the United States Census Bureau, the city has a total area of 2.36 square miles (6.11 km²), of which, 2.35 square miles (6.09 km²) is land and 0.01 square miles (0.03 km²) is water.^[12]

Many tributaries of the Snake River run through the Rigby area including the Henry’s Fork, South Fork, and others. With the large amount of water, Jefferson County surrounding Rigby is home to the largest cottonwood forest west of the Mississippi River.^[13]