hospital districts, community college districts, and utility districts (one utility district near Austin was the plaintiff in a landmark Supreme Court case involving the Voting Rights Act). Municipal, school district, and special district elections are nonpartisan, though the party affiliation of a candidate may be well-known. County and state elections are partisan. Demographics The United States Census Bureau determined the resident population of Texas was 29,145,505 at the 2020 U.S census, a 15.9% increase since the 2010 United States census. At the 2020 census, the apportioned population of Texas stood at 29,183,290. The 2015 Texas Population Estimate program estimated the population was 27,469,114 on July 1, 2015. In 2010, Texas had a census population of 25,145,561. Texas is the second-most populous state in the United States after California and the only other U.S. state to surpass a total estimated population of 30 million people as of July 2, 2022. In 2015, Texas had 4.7 million foreign-born residents, about 17% of the population and 21.6% of the state workforce. The major countries of origin for Texan immigrants were Mexico (55.1% of immigrants), India (5%), El Salvador (4.3%), Vietnam (3.7%), and China (2.3%). Of immigrant residents, some 35.8 percent were naturalized U.S. citizens. As of 2018, the population increased to 4.9 million foreign-born residents or 17.2% of the state population, up from 2,899,642 in 2000. In 2014, there were an estimated 1.7 million undocumented immigrants in Texas, making up 35% of the total Texas immigrant population and 6.1% of the total state population. In addition to the state's foreign-born population, an additional 4.1 million Texans (15% of the state's population) were born in the United States and had at least one immigrant parent. According to the American Community Survey's 2019 estimates, 1,739,000 residents were undocumented immigrants, a decrease of 103,000 since 2014 and increase of 142,000 since 2016. Of the undocumented immigrant population, 951,000 have resided in Texas from less than 5 up to 14 years. An estimated 788,000 lived in Texas from 15 to 19 and 20 years or more. Texas's Rio Grande Valley has seen significant migration from across the U.S.–Mexico border. During the 2014 crisis, many Central Americans, including unaccompanied minors traveling alone from Guatemala, Honduras, and El Salvador, reached the state, overwhelming Border Patrol resources for a time. Many sought asylum in the United States. Texas's population density as of 2010 is 96.3 people per square mile (34.9/km2)