Elm Creek is a census-designated place (CDP) in Maverick County, Texas, United States. The median income for a household in the CDP was $21,791, and the median income for a family was $21,706. Males had a median income of $18,021 versus $11,500 for females. The per capita income for the CDP was $6,300. About 36.5% of families and 40.8% of the population were below the poverty line, including 46.5% of those under age 18 and 11.5% of those age 65 or over.