The attacker was driving a truck carrying food when he detonated his explosives, destroying shops and stalls that had been set up in the busy outdoor Sadriyah market, police said, giving the casualty toll.
Güncelleme Tarihi: 20 Eylül 2018, 18:16
Officials said nearby hospitals were being flooded with victims from the blast.
The blast occurred at 4:40pm as the market was crowded with people buying food for their evening meal.
The bombing was the latest in a series of attacks against commercial targets in the capital as insurgents seek to maximise the number of people killed ahead of a planned US-Iraqi security sweep.
Violence in northern Iraq
In the northern city of Kirkuk, four car bombings - one of which was a suicide attack - killed at least four civilians and wounded 37.
Two of the cars detonated outside the offices of the main Kurdish parties in the city.
A police source said the authorities had banned vehicles from the roads and sealed all entrances to Kirkuk to prevent more car bombings.
In Iraq's north-west, another curfew was imposed in Mosul, Iraq's third largest city, after clashes between insurgents and police erupted in several neighbourhoods.
Violence continued in Mosul despite the curfew. A car bomb hit an ambulance and killed an injured woman who was being taken to hospital and six mortar bombs struck the offices of the state-funded Iraqiya television channel.
Earlier in the day, a curfew had also been imposed on Samarra after six police commandos were killed when a police checkpoint just north of the city was attacked by armed men.
Shia leader calls for calm
In the Shia theological centre of Najaf, Iraq's top Shia cleric, the Ayatollah Ali al-Sistani, repeated his calls for calm.
"The Islamic nation is passing through difficult conditions and facing tremendous challenges that threaten its future," his new fatwa, or religious edict, said.
"Everybody knows the necessity for us to stand together and reject the sectarian tension to avoid stirring sectarian differences."