The second season of the American situation comedy television series, The Office, premiered in the United States on NBC on September 20, 2005, and ended on May 11, 2006.

The season stars Steve Carell, Rainn Wilson, John Krasinski, Jenna Fischer, and B. J. Novak, with supporting performances from Melora Hardin, David Denman, Leslie David Baker, Brian Baumgartner, Kate Flannery, Angela Kinsey, Oscar Nunez, and Phyllis Smith.

Their compatibility becomes more obvious as Jim's feelings for Pam continue to grow, while she struggles with her relationship with warehouse worker Roy Anderson (David Denman).

Returning writers from last season include Daniels, Larry Wilmore, Michael Schur, Mindy Kaling, Paul Lieberstein, and B. J. Novak.

Joining the writing staff for the second season are Lee Eisenberg and Gene Stupnitsky, who also served as story editors, and Jennifer Celotta, who was a consulting producer.

[2] Series star, Steve Carell, wrote his first Office episode, the season finale, "Casino Night".

Halfway through the season, eight of the show's recurring guest stars were promoted to series regulars and credited just after the main titles and before the writers and producers.

[15] As the season progressed, the success of Carell's hit summer movie The 40-Year-Old Virgin and online sales of episodes at iTunes helped the show to garner viewers.

[16] The increase in viewership led NBC to move the series to the "Must See TV" Thursday night in January 2006, where ratings continued to grow.

"[21] Furthermore, Rizzo wrote that the season was filled with "fantastically real characters" as well as "one of the best-handled romances in TV history".

[22] Goldman praised the world-building of the season, writing that it "does a wonderful job of developing the rest of the staff of Dunder-Mifflin [sic], something the UK version could never do to this extent".

[22] Josh Wolk, an Entertainment Weekly television critic, said that the show has "perfecting workaday moments so hilariously and relatably awkward that it makes viewers both laugh and cringe".