Miner is located at the southern end of Interstate 57 (I-57).
There were 408 households out of which 31.9% had children under the age of 18 living with them, 57.4% were married couples living together, 9.6% had a female householder with no husband present, and 28.7% were non-families. 25.2% of all households were made up of individuals and 12.3% had someone living alone who was 65 years of age or older. The average household size was 2.48 and the average family size was 2.92.
In the city the population was spread out with 24.0% under the age of 18, 8.0% from 18 to 24, 26.7% from 25 to 44, 26.0% from 45 to 64, and 15.2% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 92.0 males. For every 100 females age 18 and over, there were 89.4 males.
The median income for a household in the city was $30,750, and the median income for a family was $35,132. Males had a median income of $28,611 versus $18,487 for females. The per capita income for the city was $17,409. About 16.3% of families and 18.6% of the population were below the poverty line, including 21.7% of those under age 18 and 29.2% of those age 65 or over.