Andy Dekaney High School is a public secondary school located at 22351 Imperial Valley Drive and Bammel Road in unincorporated Harris County, Texas, United States, with a ZIP code of 77073.

Dekaney serves a small portion of Houston and sections of unincorporated Harris County. Dekaney serves the communities of Cranbrook, Glen Abbey, and Remington Ranch.

The school, which serves grades 9 through 12, is a part of the Spring Independent School District.

Dekaney High School, which opened in 2007, is named after Andy Dekaney, a former school district board member. It opened because too many students attended Westfield High School, which at the time was the largest high school in the nation by student enrollment.

In 2015 the school administration announced that it would create "small learning communities" within Dekaney in order to improve academic performance, and each would have a dedicated section of the school. This plan was discontinued starting with the 2017–2018 school year.

In February 2017 the district proposed redrawing the attendance boundaries of its high schools; this would take effect in the 2020–2021 school year. The district also plans to establish one ninth grade center for each comprehensive high school. According to the proposed 2020-2021 high school map, the eastern portion of the Spring census-designated place will be reassigned from Spring High School to Dekaney High. The school district delayed the rezoning at least until after the 2021–2022 school year due to the COVID-19 pandemic in Texas, as it determines how the pandemic changed student enrollment patterns in Spring ISD.

The school received the Texas Education Agency (TEA) ratings of "academically unacceptable" or "improvement required", the lowest rankings, in 2008, 2011, 2013, and 2017. The school received a rating of "not rated" in lieu of "improvement required" in 2018 due to the impact of Hurricane Harvey.

Nora Olabi of The Spring Observer wrote in 2015 that Dekaney "has struggled to maintain high academic standards."