Subreddits starting with I

The I2P anonymous network.

"I am a…": ask anything sessions with interesting people.

It's Always Sunny in Philadelphia.

For students at Iowa State.

Iceland: news, events, and local discussion.

Share your cover songs.

Get help identifying a font.

Intelligent dance music.

Recommendations based on what you already like.

Funny stories and pictures from IT work.

Share your thoughts on a film you just watched.

Illinois: news and discussion.

Discover illustrations and discuss visual storytelling.

Help with Adobe Illustrator.

Comics from Image Comics.

Art of imagined characters.

Art of imagined landscapes.

Art of imagined monsters.

Art of imagined technology.

The Imgur image-hosting site and community.

Improv comedy: games, classes, and performances.

India: news, events, and local discussion.

In-depth sports analysis.

India: news and discussion.

Indiana: news and discussion.

Indianapolis: news, events, and local discussion.

For students at Indiana University.

Indian cooking and food.

Indie music: bands and new releases.

Indie rock music: artists, albums, and recommendations.

Independent films and filmmakers.

Indie folk music: artists, albums, and recommendations.

Indie games: releases, recommendations, and devs.

Indie games: news, releases, and developers.

Indonesia: news and discussion.

Growing plants indoors.

Industrial design work and careers.

Industrial music: artists, albums, and recommendations.

Photos of factories, industry, and heavy machinery.

IndyCar racing: news, races, and drivers.

For people with the INFJ personality type.

Informative infographics on any topic.

For people with the INFP personality type.

Photos of bridges, dams, roads, and other infrastructure.

The location-based game Ingress.

The Inland Empire, California.

The Insanity workout programme.

Photos and questions about insects and bugs.

Support for people with insomnia.

Inspiring images, quotes, and stories.

Discussion of Instagram.

Photos of beautiful musical instruments.

Questions and discussion about insurance.

Interesting links and facts.

Interesting photos, videos, and facts.

Interior design ideas and help.

International politics.

Useful and interesting websites.

For people with the INTJ personality type.

For people with the INTP personality type.

A community for introverts.

A community for introverts.

Discussion of investing, markets, and strategy.

Apple's iOS: news and help.

Games on iPhone and iPad.

iOS app development.

Customised iPhone home screens.

Iowa: news, events, and local discussion.

Iowa City: local discussion.

The iPad: apps, news, and help.

Making music on iPad.

The iPhone: news, help, and discussion.

iPhone app development.

Help with iPhone problems.

IPv6 networking: setup, adoption, and help.

Iran: news and discussion.

Ireland: news and discussion.

Irish history from ancient times to today.

International relations study and discussion.

Discussion of Islam and Muslim life.

Israel: news and discussion.

Italy: news and discussion.

Discussion of the sitcom The IT Crowd.

Share photos you took and get feedback.

Moving to another country.

Ask how to learn new skills.

The Industrial Workers of the World union.