Years after the September 11 attacks, two-thirds of New Yorkers say they are still "very concerned" about another attack on the city, according to a New York Times/CBS News poll released.

Sixty-nine per cent of those polled in New York said they were "very concerned" about another attack, down only slightly from 74 per cent in October 2001, The New York Times said.

In a poll of 838 adults, nearly one-third of New Yorkers said they thought about September 11 every day, the newspaper said.

Nearly one-third of the respondents said they had not gone back to pre-September 11 routines and were still dealing with changes caused by the attacks that killed 2,759 people in the destruction of the World Trade Centre.

A separate New York Times/CBS News national poll of 1,206 adults found fears of another attack seemed less acute and personal outside New York, the newspaper said. Only 22 per cent in the national poll said they were still "very concerned" about an attack in their hometowns, down from 39 per cent five years ago, while 75 per cent said daily life had largely returned to normal, The New York Times said.

Seventy-two per cent of New Yorkers said the government could do more to protect the United States from future attacks, compared with 58 per cent in the national poll, the article said.

Four in 10 New Yorkers polled said they thought the threat of terrorism had increased since 2001 and 81 per cent said they thought Americans would always have to live with the threat, the newspaper reported.

The telephone polls were conducted in August and each had a margin of error of plus or minus three percentage points.