Rembrandt is a city in Buena Vista County, Iowa, United States. The population was 209 at the time of the 2020 census. Rembrandt is loc…Rembrandt is a city in Buena Vista County, Iowa, United States. The population was 209 at the time of the 2020 census. Rembrandt is located at 42°49'35" North, 95°9'57" West. According to the United States Census Bureau, the city has a total area of 0.20 square miles, all land.