New Vienna, Iowa  New Vienna is a city in Dubuque County, Iowa, United States. It is part of the Dubuque, Iowa Metropolitan Statistical Area. The population was 407 at the 2010 census, up from 400 in 2000. New Vienna is home to the Saint Boniface Catholic Church. The city promotes itself with the slogan "The eNVy of Iowa". New Vienna is located at (42.548404, -91.113568). According to the United States Census Bureau, the city has a total area of , all land. New Vienna was initially settled by a group of German immigrant families who were living in Ohio. These families had come to the area in search of farmland. One such family was that of William Steffen Sr. and his wife Mary. William and Mary were originally from Recklinghausen, in what was then the Province of Westphalia and today is Germany. They came to the United States and settled in Ohio. William and Mary and their children joined the other German immigrant families who came to New Vienna in the 1840s. The descendants of William and Mary number in the thousands today, and some of their descendants still live in New Vienna and surrounding areas. Boniface Catholic Church was established for the local families that established New Vienna. This church is notable for its late 19th century William Schuelke pipe organ. This organ is one of the few original remaining Schuelke Organs - except for an electric blower it has been basically unaltered since installation. As of the census of 2010, there were 407 people, 173 households, and 118 families residing in the city. The population density was . There were 180 housing units at an average density of . The racial makeup of the city was 98.8% White, 0.2% African American, 0.7% Asian, and 0.2% from two or more races. Hispanic or Latino of any race were 0.2% of the population. There were 173 households of which 29.5% had children under the age of 18 living with them, 59.5% were married couples living together, 6.4% had a female householder with no husband present, 2.3% had a male householder with no wife present, and 31.8% were non-families. 30.1% of all households were made up of individuals and 16.1% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the average family size was 2.93.