This is a list of number one singles of 2008 on CBC Radio 3's R3-30 charts.
| Date | Artist | Song | Album |
|---|---|---|---|
| January 10 | Stars | "The Night Starts Here" | In Our Bedroom After the War |
| January 17 | Holy Fuck | "Milkshake" | LP |
| January 24 | Basia Bulat | "Little One" | Oh, My Darling |
| January 30 | Cuff the Duke | "If I Live or If I Die" | Sidelines of the City |
| February 6 | Christine Fellows | "The Spinster's Almanac" | Nevertheless |
| February 13 | Corb Lund Band | "Horse Soldier, Horse Soldier" | Horse Soldier! Horse Soldier! |
| February 20 | The Evaporators | "Gassy Jack" | Gassy Jack & Other Tales |
| February 28 | Shad | "The Old Prince Still Lives at Home" | The Old Prince |
| March 6 | |||
| March 13 | Hayden | "Where & When" | In Field & Town |
| March 20 | |||
| March 27 | Hawksley Workman | "Piano Blink" | Between the Beautifuls |
| April 3 | Black Mountain | "Stormy High" | In the Future |
| April 10 | |||
| April 17 | |||
| April 24 | Jason Collett | "Out of Time" | Here's to Being Here |
| May 1 | Cadence Weapon | "In Search of the Youth Crew" | Afterparty Babies |
| May 8 | |||
| May 15 | |||
| May 22 | |||
| May 29 | Destroyer | "The State" | Trouble in Dreams |
| June 5 | Crystal Castles | "Black Panther" | Crystal Castles |
| June 12 | |||
| June 19 | Kathleen Edwards | "The Cheapest Key" | Asking for Flowers |
| June 26 | |||
| July 4 | Constantines | "Our Age" | Kensington Heights |
| July 11 | |||
| July 18 | Tokyo Police Club | "Tessellate" | Elephant Shell |
| July 25 | |||
| July 31 | |||
| August 7 | Islands | "The Arm" | Arm's Way |
| August 14 | Sam Roberts | "Them Kids" | Love at the End of the World |
| August 21 | |||
| August 28 | Wolf Parade | "Call It a Ritual" | At Mount Zoomer |
| September 4 | |||
| September 11 | Elliott Brood | "Without Again" | Mountain Meadows |
| September 18 | Sloan | "Believe in Me" | Parallel Play |
| September 25 | |||
| October 2 | Matt Mays & El Torpedo | "Rock Ranger Record" | Terminal Romance |
| October 9 | Women | "Black Rice" | Women |
| October 16 | The Stills | "Eastern Europe" | Oceans Will Rise |
| October 23 | Human Highway | "The Sound" | Moody Motorcycle |
| October 30 | Snailhouse | "(Not) Superstitious" | Lies on the Prize |
| November 6 | Chad VanGaalen | "Willow Tree" | Soft Airplane |
| November 13 | |||
| November 20 | |||
| November 27 | Winter Gloves | "Factories" | About a Girl |
| December 4 | Sweatshop Union | "Time Machine" | Water Street |
| December 11 | Stars | "14 Forever" | Sad Robots |
| December 18 | |||
| December 25 | The Dears | "Money Babies" | Missiles |
| Year-end Top 100 | Tokyo Police Club | "Tessellate" | Elephant Shell |
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