Job advertisements on the internet rose by 2.6 per cent in March compared to a month earlier, federal data shows.

The federal Department of Education, Employment and Workplace Relations (DEEWR) internet vacancy index was 88.5 points in March, down 13.9 per cent in seasonally adjusted terms, from a year ago.

Internet-based vacancies rose in six of the eight occupational groups monitored by the department, figures show.

The strongest rises were for machinery operators and drivers, up 4.7 per cent, and community and personal service workers, up 3.9 per cent.

A 5.1 per cent fall for labourers and a 0.2 per cent drop in clerical and administrative workers partly offset the increases.

Vacancies advertisements rose in four states and the Northern Territory during March.

Queensland had the strongest increase, up 4.5 per cent, followed by Tasmania with 2.7 per cent.

The largest monthly fall was a 2.8 per cent drop in the Northern Territory.

Western Australia was the only region to post a rise in vacancies advertised on the internet over the year, up 3.6 per cent.

The ACT had the weakest demand for workers as measured by the internet index over the year, down 21.8 per cent, followed by NSW with a 20.3 per cent fall, Tasmania declining 20.0 per cent and a 19.6 per cent drop in Victoria.

AAP