James Grattan, nicknamed "Jimmy the Kid"[1] (born July 28, 1974, in Ottawa, Ontario) is a Canadian curler from Oromocto, New Brunswick.

For the 2012–13 season, Grattan joined 2005 Canadian junior champion brothers Jason and Darren Roach, as Steve Howard and Charlie Sullivan have moved on to other interests.

Grattan finished runner-up at the 2019 NB Tankard the following season, falling short to Terry Odishaw in the final.

Grattan and his team of third Paul Dobson, second Andy McCann, lead Jamie Brannen and alternate Chris Jeffrey had a successful 2019–20 season.

[4] After starting 1–2, they upset higher seeds Ontario's John Epping and British Columbia's Steve Laycock to sit in a good spot going into their final two games.

As the reigning provincial champions, Team Grattan was invited to represent New Brunswick at the 2021 Tim Hortons Brier, which they accepted.

[6] One member of Grattan's team, Paul Dobson, opted not to attend the event due to travel restrictions.

[8] At the Brier, Grattan and his New Brunswick rink had a strong start, defeating higher seeds Mike McEwen and Brad Jacobs to sit at 4–1 with three games left.