Australians continue to be among the least satisfied users of broadband in the world, according to a new report.

In a ranking of 26 countries based on respondents' level of satisfaction with high-speed broadband, Australia came in at number 23, followed only by Brazil, Peru and Italy.

The finding appears in a new report by research firm Ipsos about the world's infrastructure needs and priorities.

It found Australians were largely satisfied with the quality and performance of airports, water and sewerage systems, and rail networks, and were most dissatisfied with broadband, energy generation infrastructure and flood defences.