Goldsby is located at (35.146712, -97.473764).
According to the United States Census Bureau, the town has a total area of 19.3 square miles (50 km2), of which 19.2 square miles (50 km2) is land and 0.04 square miles (0.10 km2) (0.10%) is water.
Goldsby is closely tied to its neighbor to the south, Washington. As Goldsby has no post office, mail is processed through the Washington post office (zip 73093). Goldsby falls within the boundaries of the Washington public school district. However, Goldsby provides Washington with other resources such as fire department and water services.
As of the 2012 United States Census estimate, there were 1,891 people living in the city, a 57 percent increase since 2000. The population density was 98 people per square mile (38/km²). As of 2009, there were 516 housing units at an average density of 27 per square mile (10/km²). As of 2009, 1,579 residents (74%) self-identified as white, 341 (16%) self-identified as Hispanic or Latino, 117 (5.5%) self-identified as Native American, and 93 (4.4%) self-identified as of two or more races.
As of 2009, there were 1,209 households out of which 1,108 (92%) were families, 258 (21%) were married couples with children, 45 (3.7%) were single-parent households, and 101 (8.4%) were single individuals living alone. As of 2000, the average household size was 2.63 and the average family size was 3.01.
As of 2000, the population was spread out with 26.2% under the age of 18, 9.8% from 18 to 24, 30.1% from 25 to 44, 24.5% from 45 to 64, and 9.4% who were 65 years of age or older. As of 2011, the median age was 39.3 years and the population was 52.1% female and 47.9% male.
As of the 2011 United States Census estimate, the median income for a household in the town was $53,847 and the per capita income was 25,358. As of 2009, the median income for a family was $56,717. As of 2000, males had a median income of $33,281 versus $23,750 and about 6.7 percent of families and 8 percent of the population were below the poverty line, including 5.1% of those under age 18 and 8.3% of those age 65 or over.