Delhi is a city in Redwood County, Minnesota, United States. The population was 46 at the 2020 census. Delhi was platted in 1884, an…Delhi is a city in Redwood County, Minnesota, United States. The population was 46 at the 2020 census. Delhi was platted in 1884, and derives its name from Delhi, Ohio, located in the Cincinnati metropolitan area. A post office called Delhi was established in 1894, and remained in operation until 1979.