Robert James Weir (born 9 December 1988) is a Northern Irish professional footballer who plays as a central midfielder for Crusaders.

He has played in the English Football League for Tranmere Rovers, Burton Albion and Leyton Orient and Chesterfield.

[6] He had unsuccessful trials with Fulham, Stoke City and Rangers, although Larne manager Jimmy McGeough criticised these, saying "I'm not sure it proves anything.

[13] He made his debut in a 1–1 draw with Wrexham on 14 November 2010 and after impressing manager Gary Mills the loan was extended until 10 January 2011 in December.

[31] On 31 July 2020 Weir returned to Ireland and signed for Waterford,[32] now managed by his former Chesterfield boss John Sheridan.

On 21 November 2020, following the conclusion of the 2020 League of Ireland season, it was announced that Weir had signed a pre-contract with NIFL Premiership side Crusaders, to take effect from January 2021.

Weir was part of the Northern Ireland national under-18 team in March 2005 and was capped during a week-long visit to the Canary Islands in February 2006.