Shelter Cymru said evictions were at a seven-year high after analysing Ministry of Justice data on court possessions.
It comes as the number of mortgaged property repossessions in recent years has fallen.
A total of 958 social housing tenants had their homes repossessed.
Across all types of rental, nearly 2,200 householders lost their homes.
Shelter Cymru's director John Puzey said: "This year has been particularly tough for social tenants, many of whom have suffered due to changes in welfare benefits and the rising costs of living.
"We have been working with landlords to ensure that they are doing everything they can to help tenants stay afloat - but these figures show that more clearly needs to be done."
A spokesperson for the Welsh government said it had repeatedly expressed its concern about the scale, scope and speed of the UK government's welfare reform and its impact on the people of Wales.
"We are doing all we can to help mitigate these effects and are investing over Â£11m to prevent homelessness in the next financial year," a spokesman added.
"The latest official statistics show homelessness fell by 8% during April to June 2014 compared with the previous year. This is promising, however, we're determined to do more to tackle the problem."

The 60-metre steel tube was called "dirty" and "gross" by critics, after Kapoor was quoted as saying it signified "the vagina of the queen who took power".
The vandalism was discovered on Wednesday, and the work is currently being cleaned.
Kapoor called the incident "a tragedy".
Speaking to Le Figero, he said the vandals represented "a small fraction of people who have been told that any creative act is an endangerment of a sacred past, revered to the extreme."
The installation, called Dirty Corner, sits in the grounds outside the palace, the home of Marie Antoinette, the 18th Century queen of France.
He stressed to the newspaper he had never used the word "queen" to refer to the subject of the sculpture, and claimed he had been mis-quoted.
Kapoor was originally quoted in a French interview saying the work signified "the vagina of the queen coming into power" - but later said the work was open to interpretation.
"Inevitably, one comes across the body, our bodies and a certain level of sexuality. But it is certainly not the only thing it is about," he said.
In a statement, the artist added: I am aware of the power of art and its ability to offend.  Dirty Corner is in some ways itself an act of artistic violence.
"It attempts to lay bare the tidy surface of Le Notre's Versailles... It looks under the carpet of Le Notre's "Tapis Vert" and allows the uncomfortable, even the sexual.
Kapoor is a former Turner Prize-winner whose work has been shown around the world.
He is perhaps best known for the Orbital Tower at the heart of the Olympic Park in east London and for his Marsyas sculpture in the Turbine Hall of Tate Modern in London.

The 69-year-old from Brazil was a pillion passenger on a BMW motorbike. Her family have been informed.
The ride of bike was seriously injured and was airlifted to Aberdeen Royal Infirmary after the crash, at about 17:35 on Wednesday.
The occupants of the other vehicle, a Nissan Navara, were uninjured. The road was closed for several hours.
Road Policing Sergeant Rob Warnock said: "My thoughts, and that of my officers, are very much with the family and friends of the female who sadly died in this collision.
"Several people witnessed this incident and I am acutely aware that they, and others who assisted at the scene, have also been affected by the tragic circumstances.
"I would appeal to anyone who may have seen the crash or who may have seen either vehicle shortly beforehand and who hasn't yet spoken with police to do so to help us piece together exactly what happened."

Police were called to Deerhurst House, on Haymerle Road, in Peckham, on Friday afternoon.
The man, aged in his 20s, was treated by paramedics but died at the scene. His family have been told and a post-mortem examination will be held on Sunday.
Scotland Yard said no arrests had been made and appealed for witnesses to contact the force.
The number of social housing tenants who have had their homes repossessed has risen by 12% in the past year, a charity has said.
[NEXT_CONCEPT]
Vandals have sprayed-painted a controversial Anish Kapoor sculpture on display in the gardens of France's Palace of Versailles.
[NEXT_CONCEPT]
A woman had died in a crash involving a motorbike and a car on the A939 road near Tomintoul.
[NEXT_CONCEPT]
A man has been stabbed to death outside a block of flats in south London.