Fort Huachuca, a U.S. Army base, is located just south of the municipality.
According to the United States Census Bureau, the town has a total area of 2.8 square miles (7.3 km²), all of it land.
There were 713 households out of which 31.3% had children under the age of 18 living with them, 44.3% were married couples living together, 12.3% had a female householder with no husband present, and 39.3% were non-families. 32.8% of all households were made up of individuals and 11.5% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 3.13.
In the town the population was spread out with 28.4% under the age of 18, 8.8% from 18 to 24, 25.5% from 25 to 44, 24.6% from 45 to 64, and 12.7% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 93.1 males. For every 100 females age 18 and over, there were 89.4 males.
The median income for a household in the town was $26,311, and the median income for a family was $33,938. Males had a median income of $26,685 versus $20,179 for females. The per capita income for the town was $14,378. About 13.8% of families and 19.3% of the population were below the poverty line, including 24.6% of those under age 18 and 14.7% of those age 65 or over.
Today, Huachuca City is a small town located at the north exit of Fort Huachuca. The Fort is the major employment for the town, however with retirees moving in and tourism starting to become a major business, because the close proximity to Tombstone and Kartchner Caverns State Park, Huachuca City a growing area.