 In 1951 a part of Borge with 53 inhabitants was moved to Fredrikstad municipality, and on 1 January 1964 the properties Gansrød and Ulfeng with 30 inhabitants followed the same way whereas the majority of Torsnes was reunited with Borge.After the merger Borge had a population of 9,219.The rest of Borge (together with Kråkerøy, Onsøy and Rolvsøy) was merged with the city of Fredrikstad January 1, 1994.