There were 449 households out of which 34.1% had children under the age of 18 living with them, 50.6% were married couples living together, 12.2% had a female householder with no husband present, and 30.5% were non-families. 28.3% of all households were made up of individuals and 15.4% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 3.10.
In the town the population was spread out with 29.3% under the age of 18, 9.1% from 18 to 24, 25.0% from 25 to 44, 22.4% from 45 to 64, and 14.2% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 93.5 males. For every 100 females age 18 and over, there were 92.2 males.
The median income for a household in the town was $27,050, and the median income for a family was $35,417. Males had a median income of $28,438 versus $18,750 for females. The per capita income for the town was $12,917. About 10.2% of families and 15.7% of the population were below the poverty line, including 17.5% of those under age 18 and 22.3% of those age 65 or over.
Settlers ran into some difficulties when they tried to build a depot in Middle Mounds, and a plan was made to move the town to its present day location. They again renamed the town, this time calling it Mounds. Farming and stock raising industries attracted many new settlers. Mounds started a one-year high school, which graduated its first class in 1907. A total of sixteen people graduated that year, more students than both Sapulpa (four), and Tulsa (two).
Mounds enjoyed prosperity until the Great Depression; in 1924 the town's population was estimated at 2,000, but in 1950, the population had dropped to only 560.