HomeâRGV CitiesâHidalgo CountyâMcAllen Texas. McAllen Texas is the twentieth most populous city in Texas as well as largest city in Hidalgo County, Texas, United States. It is located at the southern tip of Texas in an area known as the Rio Grande Valley and is part of the American South. Its southern boundary is located on the Rio Grande River across the Mexican city of Reynosa, the Rio Grande, and about 70 miles (110 km) west of South Padre Island and the Gulf of Mexico.
In 1927, the United Kingdom changed its name to the United Kingdom of Great Britain and Northern Ireland, while the monarch's style for the next twenty years became of Great Britain, Ireland and the British Dominions beyond the Seas, King, Defender of the Faith, Emperor of India.
The following is a list, ordered by length of reign, of the monarchs of the United Kingdom of Great Britain and Northern Ireland, the United Kingdom of Great Britain and Ireland, the Kingdom of Great Britain, the Kingdom of England, the Kingdom of Scotland, the Kingdom of Ireland, and the Principality of Wales. Queen Elizabeth II became the longest-reigning British monarch on 9 September 2015 when she surpassed the reign of her great-great-grandmother Victoria. On 6 February 2017 she became the first British monarch to celebrate a sapphire jubilee, commemorating 65 years on the throne.