Peoria is located at 33°34′57″N 112°14′19″W / 33.58250°N 112.23861°W / 33.58250; -112.23861 (33.582439, −112.238548).
According to the United States Census Bureau, the city has a total area of 141.7 square miles (367 km2), of which, 138.2 square miles (358 km2) of it is land and 3.5 square miles (9.1 km2) of it (2.44%) is water.
Peoria has now annexed over 170 square miles (440 km2) and is in two counties Maricopa County and Yavapai County. It is technically the largest incorporated city in Yavapai County even though almost all of Peoria's current population resides on the Maricopa side.
Source: Wikipedia (as of 04/11/2019). Read more from Wikipedia