I have posted some information about Dutch-born persons recorded in US censuses for 1870, 1880, 1890, 1900, 1920, and 1960. Censuses prior to 1870 did not ask about country of birth. For each year, I give the US total population, the Dutch-born total population in the US (information from some states not available, however), the total NY population, the total Dutch-born population in NY, the number of Dutch-born people in the NY counties containing the highest numbers of Dutch-born, and the number of Dutch-born in the counties covered by my website. To access this information, go to my website: http://freepages.genealogy.rootsweb.com/~clifflamere/ In the Table of Contents, click on Censuses. The article you are looking for is the first one, "Dutch in NY Censuses 1870-1960". Cliff