Males have a median income of ,417 versus ,000 for females. 1.3% of the population and 0.0% of families are below the poverty line.
As of 2010-2014, the total Dennison population is 150, which has shrunk 10.71% since 2000.
The population growth rate is much lower than the state average rate of 9.44% and is much lower than the national average rate of 11.61%.
Dennison median household income is $45,000 in 2010-2014 and has has shrunk by 12.90% since 2000.
There are 60 households out of which 41.7% have children under the age of 18 living with them, 65.0% are married couples living together, 8.3% have a female householder with no husband present, and 18.3% are non-families.
16.7% of all households are made up of individuals and 3.3% have someone living alone who is 65 years of age or older.
The average household size is 2.80 and the average family size is 3.06. For every 100 females age 18 and over, there are 116.7 males.
In the city the population is spread out with 30.4% under the age of 18, 7.1% from 18 to 24, 33.3% from 25 to 44, 20.2% from 45 to 64, and 8.9% who are 65 years of age or older. The median income for a household in the city is ,667, and the median income for a family is ,750.
As of the 2000 census, the city had a total population of 168.
\n According to the United States Census Bureau, the city has a total area of 3.3 km² (1.3 mi²). \n As of the census of 2000, there are 168 people, 60 households, and 49 families residing in the city. There are 64 housing units at an average density of 19.5/km² (50.4/mi²).
The racial makeup of the city is 91.67% White, 0.00% African American, 0.60% Native American, 1.79% Asian, 0.00% Pacific Islander, 0.00% from other races, and 5.95% from two or more races.
0.00% of the population are Hispanic or Latino of any race.