| What population figures is this quiz using? Brownsville, McAllen, Niagara Falls, and Calexico are 2000 Census populations. San Diego, Detroit, El Paso, Buffalo, and Laredo appear to be late 2000s population estimates, possibly 2008 (definitely not 2009). Del Rio is a complete mistery. Its 1990 Census population was around 31,000, its 2000 Census population was around 34,000, and its 2009 estimated population was around 37,000. This quiz has its population as 46,682. |