With a handful of districts yet to have their votes tallied, the result on Thursday morning was still almost even between the centre-left and and centre-right.
This means the Alliance parties are on 40.2 per cent, with an estimated 143 seats in the Riksdag, and the Social Democrats, their Green partners and Left supporter party are slightly higher, on 40.7 per cent, and so have a likely 144 mandates.
Some seats are reported to have changed hands, but mostly within the blocs: one from Social Democrats to Greens and one from Christian Democrats to Liberals.
The Sweden Democrats are on 17.5 per cent and an estimated 62 seats, after losing one to the Center Party.
We spoke with political scientist Sofie Blombäck to make sense of the proceedings.
Workers still counting absentee ballots in tight election3:23 min 3:23 min
Centre-right Alliance makes power play in hung parliament4:17 min 4:17 min
Record number of voters switched party5:43 min 5:43 min
Votes from abroad could play decisive role2:33 min 2:33 min