As of the census of 2000, there were 4,022 people, 1,281 households, and 927 families residing in the town. The population density was 919.4 people per square mile. There were 1,427 housing units at an average density of 326.2 per square mile. The racial makeup of the town was 84.73% White, 0.77% Black or African American, 1.84% Native American, 0.52% Asian, 0.07% Pacific Islander, 9.87% from other races, and 2.19% from two or more races. 19.54% of the population were Hispanic or Latino of any race. There were 1,281 households out of which 36.3% had children under the age of 18 living with them, 59.3% were married couples living together, 9.9% had a female householder with no husband present, and 27.6% were non-families. 19.7% of all households were made up of individuals and 10.5% had someone living alone who was 65 years of age or older. The average household size was 2.94 and the average family size was 3.37. In the town, the population was spread out with 27.6% under the age of 18, 22.8% from 18 to 24, 18.9% from 25 to 44, 18.3% from 45 to 64, and 12.4% who were 65 years of age or older. The median age was 25 years. For every 100 females, there were 87.9 males. For every 100 females age 18 and over, there were 83.5 males. The median income for a household in the town was $32,412, and the median income for a family was $40,392. Males had a median income of $35,815 versus $20,964 for females. The per capita income for the town was $12,961. 17.2% of the population lives below the poverty line.
Emergency response
In Thatcher, police services are provided by the Thatcher Police Department, often in conjunction with Eastern Arizona College Police and the Graham County Sheriff's Office. Emergency 911 services are provided by the 24/7 dispatch center of the Graham County Sheriff's Office. Fire services are provided by the all volunteer Thatcher Fire Department, which has the capability to respond with various types of equipment, including several fire engines and a ladder truck. Mount Graham Regional Medical Center is the medical services provider for the area.
History
Thatcher was originally settled by members of The Church of Jesus Christ of Latter-day Saints. The first settler was John M. Moody who arrived in Thatcher with his wife and children in 1881. The founding of Thatcher is attributed to Mormon pioneer Christopher Layton, who bought two thousand acres, named the acreage "Thatcher", divided them into lots, and sold those lots to Mormon settlers. Layton also bought a gristmill and built roads, canals and homes. Eastern Arizona College traces its history to the St. Joseph Stake Academy started by the church in nearby Central. Central is also the location of the Gila Valley Arizona Temple.
Frank Wanlass, inventor of CMOS and pioneer in the field of solid-state electronics.
Spencer W. Kimball, former president of The Church of Jesus Christ of Latter-day Saints. Although not born in the community, he lived here from the age of three until his 20s.