Victoria's most disadvantaged communities have shown little sign of improvement over the past 15 years, a report shows.

It also finds that a tiny number of communities are shouldering most of the disadvantage burden in the state, in a pattern that is repeated in other states and territories.

Broadmeadows resident Kathy Buhagiar: ''You get judged straight away for where you live.'' Credit:Simon O'Dwyer

The Dropping off the Edge report, published by Catholic Social Services and Jesuit Social Services, tracked 667 Victorian postcodes across 22 indicators of disadvantage, including internet access, income, education level, literacy and numeracy, long-term unemployment, unskilled workers, juvenile offending and criminal convictions.

It then looked at the number of times a postcode occupied a top 5 per cent spot with an indicator, finding that just 4 per cent of postcodes occupied 28 per cent of the top spots.