As it on the eastern bank of the river, Tulrush is a part of County Roscommon. However, as a part of Creagh Parish centred in County Galway, it is has been listed along with Galway townlands in such reckonings as the 1827 Tithe Applotment and Griffith's valuation of 1868.

The proposed N6 road is scheduled to pass to through Tulrush with an entry ramp, and possibly a toll plaza, at this point.