Fishers is a city in Fall Creek and Delaware townships, Hamilton County, Indiana, United States. As of the 2020 census the population was 10…Fishers is a city in Fall Creek and Delaware townships, Hamilton County, Indiana, United States. As of the 2020 census the population was 105,631. A suburb of Indianapolis, Fishers has grown rapidly in recent decades: about 350 people lived there in 1963, 2,000 in 1980, and only 7,500 as recently as 1990.