Lives were lost across five provinces, according to the National Flood and Storm Control Agency, quoted by the Associated Press.
In Quang Ngai province, flood waters reportedly rose above a previous peak recorded in 1999.
A tropical depression has dumped rain on the country.
Earlier in the week, at least 13 people died and 81 were injured when Tropical Storm Haiyan made landfall in north Vietnam after wreaking havoc in the Philippines.
There has been disruption to the coffee harvest and bean drying in Vietnam's central highland provinces, Reuters news agency reports.
The country is the world's top robusta coffee producer, accounting for around 17% of the world's output.
Flood waters have started to recede in some areas, allowing residents to return and begin digging out their homes, officials said.
Binh Dinh Province reported the highest number of deaths, followed by Quang Ngai, the official Thanh Nien (Young People) newspaper reports.
Bui Thi Thanh Chuyen, a woman in Binh Dinh, told Vietnamese state TV on Saturday she had rushed home to try and help her mother, who was trapped in her house.
"All I heard [on the phone] from my mother was 'Help me, daughter' before the connection was cut off," she said.
"I rushed here to try to help her but I cannot cross the flood to the house."
In the Danang area, villager Vo Ngoc Nghiem described the speed of the disaster: "We are familiar with floods every year but this time it rose so quickly that we had no time to cope with it.
"We weren't warned about the reservoir release. The children were at school and they were stranded there."
Some 100,000 houses were submerged and roads were closed and some national train services cancelled.
Flood waters rose quickly after 15 hydro power plants opened their sluice gates as a safety measure.
Earlier reports on the flooding gave a slightly higher estimate for deaths.

Clinic26 will provide sexual health services and emotional support to men of all ages at the Ambrose Centre at the Royal London Hospital.
On average, 12,000 men are raped and 72,000 are sexually abused each year, Home Office statistics show.
The clinic has been set up in partnership with Survivors UK.
One sexual abuse victim said he was thrilled when he heard the clinic was opening.
Jay - not his real name - said he was sexually assaulted by a nurse when he had a routine health screening in 2013.
"I was hugely distressed by it (the assault). It took me nine months to go back for another screening," he said.
Initially, the health trust did not take action against the nurse, but it eventually reinvestigated before another victim came forward. The nurse was found guilty and was jailed for two years.
Jay said he wanted to go to a place "where people knew" he'd been sexually assaulted and he didn't have to disclose it to see the reaction.
Andy Williams, consultant physician at The Royal London Hospital, said: "We need to break the taboo that allows men to suffer in silence and this clinic is the beginning of what we hope will be a valued support resource for men in east London."
Alan Robertson, Independent Sexual Violence Advisor at Survivors UK, said: "Going to a sexual health clinic can be a daunting prospect for anyone, but especially so for someone who has experienced trauma or an abuse of power."
The clinic will run on the afternoon of the last Monday of each month.
Flooding and landslides in central Vietnam have left at least 28 people dead, nine missing and some 80,000 homeless since Friday.
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Support groups have set up what they say is the first UK clinic to offer support for male sexual abuse victims.