High Quality Content by WIKIPEDIA articles! Sacred Heart is a city in Renville County, Minnesota, United States. The population was 549 at the 2000 census.As of the census of 2000, there were 549 people, 246 households, and 147 families residing in the city. The population density was 553.2 people per square mile (214.1/km²). There were 290 housing units at an average density of 292.2/sq mi (113.1/km²). The racial makeup of the city was 97.45% White, 0.18% Native American, 1.46% from other races, and 0.91% from two or more races. Hispanic or Latino of any race were 7.10% of the population.