Import Blocks From Shapefiles
Visit the US Census TIGER/Line Shapefiles page; you will need several files. First select the State you’re interested in. Download the file labeled “Place (Current)”. Next, select the County you’re interested in. From the county’s page, download the files labeled “All Lines”, “Topological Faces (Polygons With All Geocodes)”, and “Feature Names Relationship File”. Upload all four of those files using this form: