The Tomaga River, an open mature wave dominated barrier estuary^[2] or perennial stream,^[3] is located in the South Coast region of New South Wales, Australia.

Tomaga River rises about 2.5 kilometres (1.6 mi) northeast of Mogo Hill and flows generally southwest and then southeast, joined by one minor tributary, before reaching its mouth at the Tasman Sea of the South Pacific Ocean at Mossy Point.^[3] The river descends 92 metres (302 ft) over its 16 kilometres (9.9 mi) course.^[1]

The catchment area of the river is 91.9 square kilometres (35.5 sq mi) with a volume of 1,411 megalitres (49.8×10^⁶ cu ft) over a surface area of 1.8 square kilometres (0.69 sq mi), at an average depth of 1 metre (3 ft 3 in).^[4]

• Rivers of New South Wales
• List of rivers of New South Wales (L–Z)
• List of rivers of Australia

v t e South Coast, New South Wales
Cities	Nowra
Towns & Townships	Basin View Batehaven Batemans Bay Bawley Point Bega Bemboka Bendalong Bermagui Berry Bodalla Boydtown Broulee Burrill Lake Callala Bay Candelo Cobargo Congo Culburra Beach Dalmeny Eden Fishermans Paradise Frogs Hollow Greenwell Point Huskisson Hyams Beach Kianga Kioloa Lake Conjola Malua Bay Manyana Merimbula Milton Mogo Mollymook Moruya Mossy Point Mystery Bay Narooma Narrawallee Nelligen Nerrigundah Numbugga Pambula Pambula Beach Potato Point Pyree Quaama Rosedale Sanctuary Point South Durras St Georges Basin Sussex Inlet Tabourie Lake Tathra Tilba Tomakin Tomerong Towamba Tura Beach Tuross Head Ulladulla Vincentia Wandandian Wolumla Wonboyn Wyndham
Local government areas	Bega Valley Shire City of Shoalhaven Eurobodalla Shire Jervis Bay Territory
National parks	Beowa Biamanga Booderee Bournda Budawang Clyde River Conjola Deua Eurobodalla Gulaga Jerrawangala Jervis Bay Kooraban Mimosa Rocks Monga Morton Mount Imlay Murramarang South East Forest Wadbilliga
Rivers and other waterbodies	Bega Bemboka Bermagui Bimberamala Brogo Buckenbowra Clyde Deua Dry Genoa Merrica Moruya Murrah Nadgee Nullica Nunnock Pambula Queens Pound Shoalhaven St Georges Basin Tomaga Towamba Tuross Wadbilliga Wallagaraugh White Rock Wog Wog Lake Wollumboola Wonboyn Yadboro Yowaka Yowrie

35°50′S 150°11′E / 35.833°S 150.183°E / -35.833; 150.183