Martensdale, Iowa

As of the census[8] of 2010, there were 465 people, 186 households, and 116 families living in the city. The population density was 1,162.5 inhabitants per square mile (448.8/km²). There were 198 housing units at an average density of 495.0 per square mile (191.1/km²). The racial makeup of the city was 98.5% White and 1.5% from two or more races. Hispanic or Latino of any race were 1.9% of the population.

There were 186 households, of which 36.6% had children under the age of 18 living with them, 49.5% were married couples living together, 9.1% had a female householder with no husband present, 3.8% had a male householder with no wife present, and 37.6% were non-families. 30.6% of all households were made up of individuals, and 12.9% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 3.21.

The median age in the city was 34.6 years. 28% of residents were under the age of 18; 8.6% were between the ages of 18 and 24; 25.6% were from 25 to 44; 25.6% were from 45 to 64; and 12.3% were 65 years of age or older. The gender makeup of the city was 51.4% male and 48.6% female.

As of the census[9] of 2000, there were 467 people, 174 households, and 129 families living in the city. The population density was 1,236.3 inhabitants per square mile (477.3/km²). There were 181 housing units at an average density of 479.2 per square mile (185.0/km²). The racial makeup of the city was 98.50% White, 0.43% Native American, 0.21% Pacific Islander, 0.21% from other races, and 0.64% from two or more races. Hispanic or Latino of any race were 1.71% of the population.

There were 174 households, out of which 38.5% had children under the age of 18 living with them, 60.3% were married couples living together, 8.0% had a female householder with no husband present, and 25.3% were non-families. 23.0% of all households were made up of individuals, and 8.0% had someone living alone who was 65 years of age or older. The average household size was 2.68 and the average family size was 3.15.

In the city, the population was spread out, with 29.3% under the age of 18, 6.6% from 18 to 24, 31.7% from 25 to 44, 18.8% from 45 to 64, and 13.5% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 89.8 males. For every 100 females age 18 and over, there were 96.4 males.

The median income for a household in the city was $41,250, and the median income for a family was $50,833. Males had a median income of $40,441 versus $23,438 for females. The per capita income for the city was $16,638. About 4.0% of families and 4.5% of the population were below the poverty line, including 4.2% of those under age 18 and 6.6% of those age 65 or over.