| Official Name: | Masonville, Iowa |
| Settlement Type: | City |
| Mapsize: | 250px |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Delaware |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.85 |
| Area Land Km2: | 0.85 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 0.33 |
| Area Land Sq Mi: | 0.33 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 99 |
| Population Density Km2: | 116.88 |
| Population Density Sq Mi: | 302.75 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation M: | 311 |
| Elevation Ft: | 1020 |
| Coordinates: | 42.4797°N -91.5906°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 50654 |
| Area Code: | 563 |
| Blank Name: | FIPS code |
| Blank Info: | 19-50205 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0458848 |
Masonville is a city in Delaware County, Iowa, United States. The population was 99 at the time of the 2020 census.[2] The city is located on the western border between Delaware and Buchanan counties.
Masonville was laid out in 1858. It was named for businessman R. B. Mason.[3]
Masonville is located at 42.4797°N -91.5906°W (42.479755, -91.590591).[4]
According to the United States Census Bureau, the city has a total area of 0.33sqmi, all land.[5]
As of the census[6] of 2010, there were 127 people, 55 households, and 36 families living in the city. The population density was 384.8PD/sqmi. There were 57 housing units at an average density of 172.7/sqmi. The racial makeup of the city was 96.9% White and 3.1% from two or more races. Hispanic or Latino of any race were 0.8% of the population.
There were 55 households, of which 25.5% had children under the age of 18 living with them, 52.7% were married couples living together, 9.1% had a female householder with no husband present, 3.6% had a male householder with no wife present, and 34.5% were non-families. 27.3% of all households were made up of individuals, and 3.6% had someone living alone who was 65 years of age or older. The average household size was 2.31 and the average family size was 2.83.
The median age in the city was 40.5 years. 24.4% of residents were under the age of 18; 4.7% were between the ages of 18 and 24; 26% were from 25 to 44; 32.3% were from 45 to 64; and 12.6% were 65 years of age or older. The gender makeup of the city was 46.5% male and 53.5% female.
As of the census[7] of 2000, there were 104 people, 49 households, and 32 families living in the city. The population density was 315.3sp=usNaNsp=us. There were 55 housing units at an average density of 166.8sp=usNaNsp=us. The racial makeup of the city was 99.04% White, and 0.96% from two or more races. Hispanic or Latino of any race were 4.81% of the population.
There were 49 households, out of which 18.4% had children under the age of 18 living with them, 44.9% were married couples living together, 18.4% had a female householder with no husband present, and 32.7% were non-families. 26.5% of all households were made up of individuals, and 18.4% had someone living alone who was 65 years of age or older. The average household size was 2.12 and the average family size was 2.42.
In the city, the population was spread out, with 14.4% under the age of 18, 18.3% from 18 to 24, 26.0% from 25 to 44, 26.9% from 45 to 64, and 14.4% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 67.7 males. For every 100 females age 18 and over, there were 81.6 males.
The median income for a household in the city was $32,000, and the median income for a family was $40,625. Males had a median income of $30,313 versus $16,667 for females. The per capita income for the city was $20,166. There were 3.0% of families and 5.1% of the population living below the poverty line, including no under eighteens and 15.4% of those over 64.
The West Delaware County Community School District operates local area public schools.[8]