1931 Hauraki by-election

{{short description|New Zealand by-election}}

{{Use New Zealand English|date=April 2024}}

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

{{Infobox election

| election_name = 1931 Hauraki by-election

| country = New Zealand

| flag_year = 1931

| type = By-election

| ongoing = no

| previous_election = 1928 New Zealand general election

| previous_year = 1928 general

| next_election = 1931 New Zealand general election

| next_year = 1931 general

| election_date = {{Start date|1931|05|27|df=y}}

| turnout = 8,161

| image1 = 120x120px

| candidate1 = Walter Massey

| party1 = Reform Party (New Zealand)

| popular_vote1 = 4,023

| percentage1 = 49.29

| image2 = 120x120px

| candidate2 = Charles Robert Petrie

| party2 = New Zealand Labour Party

| popular_vote2 = 2,599

| percentage2 = 31.84

| image3 = 100px

| candidate3 = Ebenezer Allan

| party3 = United Party (New Zealand)

| popular_vote3 = 997

| percentage3 = 12.21

| title = Member

| before_election = Arthur Hall

| after_election = Walter Massey

| before_party = Reform Party (New Zealand)

| after_party = Reform Party (New Zealand)

| result = Reform hold

}}

The Hauraki by-election of 1931 was a by-election held in the Hauraki electorate during the 23rd New Zealand Parliament, on 27 May 1931. It was caused by the death of incumbent MP Arthur Hall of the Reform Party and was won by Walter Massey.