Declan Danaher (born 11 January 1980 in London, England) is a rugby union footballer who plays at back row for London Irish in the Aviva Premiership.
Danaher joined London Irish in 1999, making his debut against Gloucester Rugby in May 2000.
He started in the 2002 Powergen Cup Final at Twickenham, as London Irish defeated the Northampton Saints.
Danaher was on the losing side in the Finals of the 2005-06 European Challenge Cup and 2008–09 Guinness Premiership.
In July 2012, he was appointed the captain of London Irish for the 2012/13 Aviva Premiership Rugby Season.
He has represented Ireland at U19 level and England at U21 level. Danaher also represented England A in 2002.
He was selected by Clive Woodward for the Senior tour of Argentina in 2002.