Houston is often referred to as the most racially diverse metro area in the country and a harbinger of the types of demographic shifts the nation is likely to face in the future. The area has undergone tremendous demographic shifts in recent decades, the most notable of which is the increase in the Hispanic population. In 2000, non-Hispanic whites made up 42 percent of Harris County’s population, and Hispanics made up 33 percent. A decade later, those proportions had almost exactly flipped. This report examines how the racial/ethnic composition of individual census tracts in Harris County has changed — or in some cases, has not — in the face of 30 years of demographic shifts across the region.