The bombings targeted a peace rally Saturday organised by union, leftist and Kurdish groups that had mobilised activists from across the country.
After being identified at the Ankara morgue, the victims' bodies were sent to their home regions for burial.
Funerals were held Monday in Ankara and Istanbul as well as in cities in Turkey's Kurdish-dominated southeast.
The leader of the pro-Kurdish Peoples' Democratic Party (HDP) Selahattin Demirtas attended several funerals in Istanbul where many coffins were draped in the yellow and red colours of the Kurdish flag.
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Her coffin was borne to the grave only by women, an AFP photographer reported.
Mourners shouted slogans against the government and President Recep Tayyip Erdogan, whom they hold responsible for the attack. "Killer State! Killer Erdogan!" they chanted.
There were no officials representing the Turkish government.
She had taken a smiling selfie of herself and fellow demonstrators on the bus on their way to the rally that was widely published in the Turkish press.
"We promise to win peace for you, Dicle," her friends chanted before she was laid to rest in the Silivrikapi cemetery on the European side of Istanbul.
In the Aegean city of Izmir, some 1,000 people turned out to bid farewell to Ayse Deniz, a local leader of the HDP, and Berna Koc, a student, the Milliyet daily said.
Other funeral ceremonies took place across southeastern and eastern Turkish cities including Batman, Bitlis, Hakkari, and Kars, media reports said.
Those killed ranged from a nine-year-old boy to a 70-year-old grandmother. The government has said that Islamic State (IS) jihadists were most likely behind the atrocity.