1966 Dawson by-election

{{Use Australian English|date=April 2024}}

{{Use dmy dates|date=August 2019}}

{{Infobox election

| election_name = 1966 Dawson by-election

| country = Australia

| type = Parliamentary

| ongoing = no

| previous_election = 1963 Australian federal election

| previous_year = 1963

| election_date = 26 February 1966

| next_election = 1966 Australian federal election

| next_year = 1966

| turnout = 37,377 (91.0%)

| registered =

| seats_for_election = The Dawson seat in the House of Representatives

| candidate1 = Rex Patterson

| image1 = x150px

| party1 = Australian Labor Party

| popular_vote1 = 20,372

| percentage1 = 55.1%

| swing1 = {{increase}}13.7

| candidate2 = John Fordyce

| image2 = 100px

| party2 = Australian Country Party (1920)

| popular_vote2 = 16,572

| percentage2 = 44.9%

| swing2 = {{decrease}}6.9

| title = MP

| before_election = George Shaw

| before_party = Australian Country Party (1920)

| after_election = Rex Patterson

| after_party = Australian Labor Party

}}

A by-election was held for the Australian House of Representatives seat of Dawson on 26 February 1966. This was triggered by the death of Country Party MP George Shaw.

The by-election was won by Labor candidate Rex Patterson.