18th Canadian Ministry

{{Short description|Government cabinet of Canada (1957–1963)}}

{{Use dmy dates|date=April 2022}}

{{Infobox government cabinet

|cabinet_name = 18th Canadian Ministry
18e conseil des ministres du Canada

|cabinet_type= ministry

|cabinet_number = 18th

|jurisdiction = Canada

|flag = Canadian_Red_Ensign_(1957-1965).svg

|flag_border = true

|image = John G. Diefenbaker (cropped).jpg

|date_formed = 21 June 1957

|date_dissolved= 22 April 1963

|government_head_title = Prime Minister

|government_head = John Diefenbaker

|government_head_history =

|state_head_title = Monarch

|state_head = Elizabeth II

|represented_by_title = Governor General

|represented_by = {{plainlist|

• Vincent Massey (1957–1959)
• Georges Vanier (1959–1963)

}}

|total_number=

|political_party = {{color box|{{Canadian party colour|CA|Progressive Conservative}}}} Progressive Conservative

|legislature_status= {{plainlist|

• Minority (1957–1958) {{Composition bar|112|265|hex={{Canadian party colour|CA|PC}}|per=1|width=120}}
• Majority (1958–1962) {{Composition bar|208|265|hex={{Canadian party colour|CA|PC}}|per=1|width=120}}
• Minority (1962–1963) {{Composition bar|116|265|hex={{Canadian party colour|CA|PC}}|per=1|width=120}}

}}

|opposition_party = {{color box|{{Canadian party colour|CA|Liberal}}}} Liberal

|opposition_leader = {{Unbulleted list|Louis St. Laurent (1957–1958)|Lester B. Pearson (1958–1963)}}

|election = 1957, 1958, 1962

|incoming_formation = 1957 federal election

|outgoing_formation = 1963 federal election

|legislature_term = {{Unbulleted list|23rd Canadian Parliament|24th Canadian Parliament|25th Canadian Parliament}}

|budget =

|previous = 17th Canadian Ministry

|successor = 19th Canadian Ministry

}}

The Eighteenth Canadian Ministry was the cabinet chaired by Prime Minister John Diefenbaker. It governed Canada from 21 June 1957 to 22 April 1963, including all of the 23rd, 24th, and 25th Canadian Parliaments. The government was formed by the Progressive Conservative Party of Canada.