New state records are presented to expand the known distribution of 10 species of Coleoptera in the United States: Priocera castaea (Newman, 1838) (Cleroidea: Cleridae), Rhadalus testaceus LeConte, 1852 (Cleroidea: Rhadalidae), Sosylus extensus (Casey, 1897) (Coccinelloidea: Bothrideridae), Nosodendron unicolor (Say, 1824) (Nosodendroidea: Nosodendridae), Bitoma crenata (Fabricius, 1775) (Tenebrionoidea: Zopheridae), Namunaria guttulata (LeConte, 1863) (Tenebrionoidea: Zopheridae), Emmesa connectens (Newman, 1838) (Tenebrionoidea: Melandryidae), Phloiotrya fusca (LeConte, 1878) (Tenebrionoidea: Melandryidae), Hoperius planatus Fall, 1927 (Adephaga: Dytiscidae) and Haliplus havaniensis Wehncke, 1880 (Adephaga: Haliplidae) by a total of 29 states; additionally, the confounding status of Phloiotrya fusca is reviewed. Updated distributions are provided for each species treated.