Zealand (Danish: Sjælland) is one of the 12 multi-member constituencies of the Folketing, the national legislature of Denmark. The constituency was established in 2007 following the public administration structural reform. It consists of the municipalities of Faxe, Greve, Guldborgsund, Holbæk, Kalundborg, Køge, Lejre, Lolland, Næstved, Odsherred, Ringsted, Roskilde, Slagelse, Solrød, Sorø, Stevns and Vordingborg. The constituency currently elects 20 of the 179 members of the Folketing using the open party-list proportional representation electoral system. At the 2022 general election it had 634,513 registered electors.

Zealand currently elects 20 of the 179 members of the Folketing using the open party-list proportional representation electoral system.^[4][5] Constituency seats are allocated using the D'Hondt method.^[6][7] Compensatory seats are calculated based on the national vote and are allocated using the Sainte-Laguë method, initially at the provincial level and finally at the constituency level.^[8][9] Only parties that reach any one of three thresholds stipulated by section 77 of the Folketing (Parliamentary) Elections Act - winning at least one constituency seat; obtaining at least the Hare quota (valid votes in province/number of constituency seats in province) in two of the three provinces; or obtaining at least 2% of the national vote - compete for compensatory seats.^[10][11]