Lombardy elected its first delegation to the Italian Senate on April 18, 1948. This election was a part of national Italian general election of 1948 even if, according to the newly established Italian Constitution, every senatorial challenge in each Region is a single and independent race. The election was won by the centrist Christian Democracy, as it happened at national level. Pavia and Mantua were the sole provinces to oppose this result, giving a plurality to the Social-Communist alliance.