<page_title> United States congressional apportionment </page_title> <section_title> List of apportionments </section_title> <table> <cell> January 3, 1959 <col_header> Effective date </col_header> </cell> <cell> Alaska admitted <col_header> Reason and/or comments </col_header> </cell> <cell> August 21, 1959 <col_header> Effective date </col_header> </cell> <cell> 437 <col_header> Size </col_header> </cell> <cell> Hawaii admitted <col_header> Reason and/or comments </col_header> </cell> </table>
United States congressional apportionment increased to 437 members upon the 1959 admission of Alaska and Hawaii.