Ishpeming is a city in Marquette County, Michigan, United States. Located in the Upper Peninsula, the population was 6,140 at the 2020 census…Ishpeming is a city in Marquette County, Michigan, United States. Located in the Upper Peninsula, the population was 6,140 at the 2020 census, less than it was in the 1950s and 1960s when the Iron ore mines employed more workers. A statue of a Native American figure, erected in 1884 in the small town square, is referred to as "Old Ish".