The 2003 National Assembly for Wales election was the second general election to the National Assembly for Wales. It was held on 1 May 2003. The election was characterised by a resurgence for the Labour Party, whilst Plaid Cymru saw a reduction in support and the number of Assembly Members they returned. Having won thirty seats, one short of a majority, Labour chose to govern in minority without a coalition partner.
This election also saw the returning of John Marek as an independent member of the Assembly. Of the 60 members elected, 30 were male and 30 were female.
It was held on the same day as the 2003 Scottish Parliament election and 2003 United Kingdom local elections.
Party leaders in 2003
Welsh Labour - Rhodri Morgan
Plaid Cymru - Ieuan Wyn Jones
Welsh Conservatives - Nicholas Bourne
Welsh Liberal Democrats - Michael James German
UK Independence Party (UKIP) - Roger Knapman
National vote
Overall turnout - 38.2%
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| style="background-color:white" colspan=15 |
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!rowspan=3 colspan=2 | Parties
!colspan=10 | Additional member system
!rowspan=2 colspan=5 | Total seats
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!colspan=5 |Constituency
!colspan=5 |Region
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! Votes !! % !! +/− !! Seats !! +/−
! Votes !! % !! +/− !! Seats !! +/−
! Total !! +/− !! %
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| || Total || 851,357 || || || 40 || || 849,552 || || || 20 || || 60 || || |}