The big picture: Americans spent 40B hours with podcasts in 2025. That equals Netflix's entire 2024 TV viewing. But podcast ads brought in just $3B, about 1% of internet ad spending.

Why it matters: The attention already moved. The money hasn't. That gap is one of the biggest opportunities in advertising right now.

Note: Netflix is making a major push into podcasts. I am not covering that this week, but expect a deep dive soon.

Let's break it down into 7 big questions:
1) How many people listen to podcasts?
2) How much time do we spend listening to podcasts?
3) How do we listen to podcasts?
4) Which podcast apps are the most popular?
5) What share of podcast time do the most popular shows account for?
6) How large is the podcast advertising market?
7) How many ads run during a podcast?

Quick answer: 115M people every week.

Share of the U.S. population that listens to podcasts weekly (Edison Research):
1) 2015 - 10%
2) 2020 - 24%
3) 2025 - 40%

Interesting: Democrats used to be more likely to listen. Now Republicans are 3 points more likely.

Daily time with podcasts (eMarketer):
1) 2019 - 11m (↑ 38%)
2) 2020 - 15m (↑ 36%)
3) 2021 - 18m (↑ 20%)
4) 2022 - 21m (↑ 17%)
5) 2023 - 22m (↑ 5%)
6) 2024 - 23m (↑ 5%)
7) 2025 - 25m (↑ 9%)
8) 2026P - 26m (↑ 4%)
9) 2027P - 27m (↑ 4%)
10) 2028P - 27m (↑ 0%)

Hours of podcast consumption (Edison Research):
1) 2015 - 8.8B
2) 2025 - 40.2B (↑ 355%)

Consumption of podcasts (Cumulus Podcast Network):
1) Mix of video and audio - 80%
2) Audio-only - 13%
3) Video-only - 8%

Wow: YouTube grew podcast time on TV screens 75% in one year!

YouTube hours of podcast consumption on a TV:
1) 2024 - 4.8B
2) 2025 - 8.4B (↑ 75%)

Why it matters: A podcast on a TV screen is streaming TV inventory. It gets targeted, measured, and sold like TV, not radio.

Share of podcast time (Edison Research):
1) YouTube - 37%
2) Spotify - 23%
3) Apple - 19%
4) Other - 21%

The kicker: The #1 podcast app is a video platform. Apple invented the category and now runs third.

Quick answer: The top 0.0003% of shows account for 35% of the viewership.

Quick math on viewing time for the average podcast:
1) 40.2B hours of viewing
2) 3.2M unique shows
3) 13K hours of viewing for the average show

Wow: The average top-10 show gets 1.4B hours of viewing per year.

This seems crazy: The top 10 podcasts are bigger than Hulu.

Hours of consumption time:
1) Top 10 podcasts (2025) - 14.1B
2) Hulu (2024) - 13.8B

Hours of consumption time:
1) Podcasts (2025) - 40.2B
2) Netflix (2024) - 40.0B

Between the lines: Podcasting is a winner-take-most market. Ten shows deliver Hulu-scale reach. The other 3.2M split the rest.

Podcast advertising (IAB/PwC):
1) 2016 - $169M (↑ 59%)
2) 2017 - $314M (↑ 86%)
3) 2018 - $479M (↑ 53%)
4) 2019 - $708M (↑ 48%)
5) 2020 - $842M (↑ 19%)
6) 2021 - $1.4B (↑ 72%)
7) 2022 - $1.8B (↑ 26%)
8) 2023 - $1.9B (↑ 5%)
9) 2024 - $2.4B (↑ 26%)
10) 2025 - $2.9B (↑ 18%)

By the numbers: Digital video grew 22% to $137B in 2025. Podcasts grew 18%.

Share of agencies that buy podcast advertising (Advertiser Perceptions):
1) 2016 - 21%
2) 2021 - 45%
3) 2026 - 76%

The tension: 76% of agencies buy podcasts, but the total market is under $3B. Everyone's in; nobody's in big.

Why: Weak identity, measurement, and programmatic tools. It's a plumbing problem, not a demand problem.

Quick answer: Ads are roughly 10% of podcast time. Shorter shows carry a higher share of ad time.

Ad load by episode length (Magellan AI):
1) <15m - 24%
2) 15-30m - 13%
3) 30-60m - 10%
4) >60m - 7%

Ad load:
1) Linear TV - 27%
2) Podcasts - 10%

Share of podcast ads by length:
1) 30s - 40%
2) 60s - 19%
3) 15s - 9%
4) 90s - 6%
5) 120s - 2%
6) Other - 25%

Podcasting in 2026 looks like CTV in 2019: massive attention, tiny spend, missing infrastructure.

What's next: As targeting, measurement, and programmatic pipes get built (and YouTube pulls podcasts into video ad systems), the dollars follow the hours. They always do.