21st Multi-member Constituency – Sliven is a constituency whose borders are the same as Sliven Province in Bulgaria.

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In the 2009 Bulgarian parliamentary election the 21st Multi-member Constituency – Sliven elected 7 members to the Bulgarian National Assembly: 6 of which were by proportionality vote and 1 was by first-past-the-post voting.

• Through first-past-the-post voting

• Through proportionality vote

2009 election

• proportionality vote

• first-past-the-post voting

• 2009 Bulgarian parliamentary election
• Politics of Bulgaria
• List of Bulgarian Constituencies