Tumbi Umbi is a mostly semi-rural suburb of the
Central Coast region of New South Wales,
Australia, located northwest of Bateau Bay. Tumbi
Umbi is part of the Wyong Shire local government
area.

Tumbi Umbi is a somewhat distributed community
on the shores of Tuggerah Lake and associated
with the creek that feeds into that body of water. In
Aboriginal times the description "A place of much
water" accurately described the swamp land that
has now been extensively drained and populated
with housing, industrial estates, a school, Mingara
Recreation Club, Mingara One Fitness and
Aquatic Centre, a pistol range and Glengara
Retirement Village.