| Official Name: | Derby, Iowa |
| Settlement Type: | City |
| Mapsize: | 250x200px |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Lucas |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.66 |
| Area Land Km2: | 0.66 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 0.26 |
| Area Land Sq Mi: | 0.26 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 90 |
| Population Density Km2: | 136.12 |
| Population Density Sq Mi: | 352.94 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 1089 |
| Coordinates: | 40.9303°N -93.4564°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 50068 |
| Area Code: | 641 |
| Blank Name: | FIPS code |
| Blank Info: | 19-20125 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2394520 |
Derby is a city in Lucas County, Iowa, United States. The population was 90 at the time of the 2020 census.[2]
According to the United States Census Bureau, the city has a total area of 0.26sqmi, all land.[4]
As of the census[5] of 2010, there were 115 people, 47 households, and 31 families living in the city. The population density was 442.3PD/sqmi. There were 55 housing units at an average density of 211.5/sqmi. The racial makeup of the city was 99.1% White and 0.9% from two or more races.
There were 47 households, of which 31.9% had children under the age of 18 living with them, 53.2% were married couples living together, 8.5% had a female householder with no husband present, 4.3% had a male householder with no wife present, and 34.0% were non-families. 25.5% of all households were made up of individuals, and 10.7% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 2.97.
The median age in the city was 41.5 years. 24.3% of residents were under the age of 18; 3.6% were between the ages of 18 and 24; 25.2% were from 25 to 44; 31.3% were from 45 to 64; and 15.7% were 65 years of age or older. The gender makeup of the city was 51.3% male and 48.7% female.
As of the census[6] of 2000, there were 131 people, 53 households, and 34 families living in the city. The population density was 497.6sp=usNaNsp=us. There were 63 housing units at an average density of 239.3sp=usNaNsp=us. The racial makeup of the city was 100.00% White.
There were 53 households, out of which 20.8% had children under the age of 18 living with them, 45.3% were married couples living together, 13.2% had a female householder with no husband present, and 35.8% were non-families. 34.0% of all households were made up of individuals, and 18.9% had someone living alone who was 65 years of age or older. The average household size was 2.47 and the average family size was 3.21.
In the city, the population was spread out, with 26.0% under the age of 18, 6.1% from 18 to 24, 26.0% from 25 to 44, 22.1% from 45 to 64, and 19.8% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 111.3 males. For every 100 females aged 18 and over, there were 110.9 males.
The median income for a household in the city was $26,667, and the median income for a family was $31,250. Males had a median income of $23,333 versus $14,500 for females. The per capita income for the city was $10,605. There were 6.1% of families and 4.5% of the population living below the poverty line, including no under eighteens and 9.5% of those over 64.
Mormon Trail Community School District operates schools serving the community.[7]
Lester J. Dickinson, U.S. Representative from Iowa's 10th district and U.S. Senator from Iowa was born in Derby.