The Theatre Organ Society of Australia (TOSA) is an Australian non-profit organisation that promotes the preservation and presentation of theatre organs. Each state has its own division, which is a free-standing and independent body.^[1]

After the silent film era ended and many theatre organs were getting scrapped, small groups of enthusiasts in the USA and the UK got together to try to preserve what they could of the remaining instruments, to save their legacy.^[2] Various societies formed during the 1960s and still function today, based in Brisbane, Sydney, Canberra, Melbourne, Hobart, Adelaide and Perth. Additional groups, although not considered formal "divisions", also share knowledge, experience and other functions in preserving and presenting theatre pipe organs across Australia.

Rod Blackmore, the longest-serving member of the society's NSW division, edited its journal, The Diaphone, from 1963 until its cessation with Vol 7, No 4 (Nov 1969).

Throughout the year, many concerts and other activities are sponsored by TOSA, and promoted through their website at tosa.net

• List of Theatre Organs in Australia
• TOSA-owned organs

• American Theatre Organ Society
• Cinema Organ Society
• Theatre Organ Society International

• tosa.net
• American Theater Organ Society
• Cinema Organ Society (UK)
• The Theatre Organ Home Page
• List of Theatre Organs in Australia

v t e Theatre organs
Builders	Traditional Austin Balcom & Vaughan Barton Christie Compton Estey Geneva Hillgreen-Lane Hinners Hill, Norman & Beard Hope-Jones Kilgen Kimball Link Marr & Colton Midmer-Losh Möller Morton Page Reuter Robert Morton E. M. Skinner Welte-Mignon Wicks Wurlitzer Digital Allen Conn Rodgers Walker
Notable artists	Bernie Anderson, Jr. Ena Baga William Baines Ronald Binge Rod Blackmore Oswell Blakeston Cameron Carpenter Gaylord Carter Doreen Chadwick Buddy Cole Jesse Crawford Florence De Jong Reginald Dixon Martin Ellis Lee Erwin Horace Finch Reginald Foort Graham W. Jackson, Sr. Dennis James Stan Kann Phil Kelsall Edwin Lemare Arnold Loxam Leonard MacClain Sandy MacPherson Al Melgard Bob Mitchell Gerald Moore Reginald New Nigel Ogden Korla Pandit Richard Purvis Bob Ralston Robin Richmond Rosa Rio Samuel Roxy Rothafel Dudley Savage Richard Simonton Fela Sowande Carl Stalling Walt Strony Firmin Swinnen Sidney Torch Oliver Wallace Pearl White George Wright Jess Yates
Groups	American Theatre Organ Society Cinema Organ Society Theatre Organ Society of Australia