This Old Dog is the third studio album by singer-songwriter and multi-instrumentalist Mac DeMarco, released on May 5, 2017 through Captured Tracks. Following the release of Another One, DeMarco moved from his isolated Queens home to a house in Los Angeles to create the album. The album spawned two singles in January, "My Old Man" and "This Old Dog", which are the two first tracks on the album. The singles "On The Level" and "One More Love Song" were released in April 2017. The album leaked on April 13, 2017.

DeMarco recorded This Old Dog while moving to Los Angeles. He describes the experiences and time it took to develop and make the album:

"I demoed a full album, and as I was moving to the West Coast I thought I'd get to finishing it quick. But then I realized that moving to a new city and starting a new life takes time. And it was weird, because usually I just write, record, and put it out; no problem. But this time, I wrote them and they sat. When that happens, you really get to know the songs. It was a different vibe."

This Old Dog was met with positive reviews from music critics. On Metacritic, which assigns a weighted mean rating out of 100 from mainstream critics, the album got a 79 out of 100, out of 24 reviews, which indicates "generally favorable reviews".

The title track garnered the Best New Track title from Pitchfork with writer Marc Hogan calling it a "shaggy ode to romantic constancy, come what may".

In his review for the album, Mark Richardson of Pitchfork writes, "DeMarco seems to kick back and let everything fall into place, but his music demonstrates a relentless devotion to craft, with all the fundamentals intact."

All tracks are written by Mac DeMarco.

Adapted from the album liner notes.