Parliamentary elections were held in Poland on 4 March 1928, with Senate elections held a week later on 11 March. The Nonpartisan Bloc for Cooperation with the Government, a coalition of the Sanation faction - won the highest number of seats in the Sejm (125 out of 444) and 48 out of 111 in the Senate–in both cases, short of a majority. Unlike latter elections during the Sanation era, opposition parties were allowed to campaign with only a few hindrances, and also gained a significant number of seats. The 1928 election is generally considered the last free election in Poland until 1989 or 1991, depending on the source.