The report was based on data from a telephone survey of 2,000 people age 12 and older in the United States.
Some 60% of respondents say they are aware of what podcasting is, and 40% say they have listened to a podcast.
Just under a quarter (24%) of US consumers say they have listened to at least one podcast in the past month (the monthly podcast audience), up from 21% in 2016 and 9% in 2008.
Some 56% of consumers who have listened to a podcast in the last month are men; 44% are women.
The monthly podcast audience is wealthier than average: 45% say they have an annual household income over $75,000, compared with 35% of the general US population.
The audience also skews younger, with 51% of monthly podcast listeners under age 34.
More than two-thirds (69%) of monthly listeners say they consume podcasts on a mobile device, up from 42% in 2013.
Some 62% of monthly listeners say they access podcasts by clicking and listening immediately; 16% download podcasts manually and listen later; 19% subscribe and listen later; and 3% don't know how they access episodes.
Most monthly listeners (62%) who subscribe to podcasts subscribe to fewer than five different shows.
About the research: The report was based on data from a telephone survey of 2,000 people age 12 and older in the United States.