Simplify the following text for a Grade 7 native English-speaking person.
Original: By population , Wichita is the largest city in Kansas and the 51st largest city in the United States .
Simplified: Wichita is the biggest city in the United States State of Kansas . Wichita is the 51st largest city in the United States with an estimated population of 354,865 in the year 2005 .