The fifth season of the American television comedy series How I Met Your Mother premiered on September 21, 2009, and concluded on May 24, 2010.

CBS broadcast the fifth season on Monday nights at 8:00 pm in the United States.

"[26] On the other hand, Amanda Sloane Murray from IGN gave the season a lukewarm review saying "So maybe this season didn't have the funniest jokes or the freshest material to work with.

On the whole, it's not one that's going to stand out in our minds as one of the best seasons in the How I Met Your Mother canon; most of us are eager to forget Robin and Barney ever happened, Robin's co-anchor Don was switched up from funny guy to boring straight man and eventually discarded; nobody made significant strides in their career or their love life.

Our group is back together, unfettered by relationships inside or outside the inner circle, and we're happy to have it that way.