With a population ( according to the census of 2006 ) of 439 -- an increase since 2002 of 32.2 % -- Straffan is the 31st most populous center in County Kildare . With a population , according to the census of 2006 , of 439 -- an increase since 2002 of 32.2 % -- Straffan is the 31st most populous center in County Kildare .