Sitemap Listings for Clarks in postal code 68628 Lot 31 Heron Point Lake Subdivision , Clarks, NE Lot 30 Heron Point Lake , Clarks, NE Lot 29 Heron Point Lake , Clarks, NE 35 Sundance Lake , Clarks, NE W 1/2 Nw 1/4, Sec 21, Township 14, Range 4 Polk County , Clarks, NE