The two crossword solutions for the term 'A State in Northern Mexico' are Sonora (6 letters) and Chihuahua (9 letters). Sonora is located in northwestern Mexico and is bordered by the states of Chihuahua to the east, Sinaloa to the south, and Baja California to the northwest. Chihuahua is located in northern Mexico and is bordered by the states of Sonora to the west, Coahuila to the east, and Durango and Zacatecas to the south. Both states are known for their desert landscapes and mountain ranges.