Delaware is a city in Iowa in Delaware County, was ted plat after Pacific Railroad and the Dubuque in 1860. The population was at the 2010 census, are released throughout each year on a flow basis. The population density was 235.4 people per square mile. The racial makeup of the city was 0.6 % and 99.4 % White, 1.06 % and 98.94 % White from two from two. The gender makeup of the city was 45.3 % female and 54.7 % male. Each new series of data incorporates the latest administrative record data, methodology and geographic boundaries.