Masters M45 marathon world record progression

Masters M45 marathon world record progression is the progression of world record improvements of the marathon M45 division of Masters athletics. Records must be set in properly conducted, official competitions under the standing IAAF rules unless modified by World Masters Athletics.

The M45 division consists of male athletes who have reached the age of 45 but have not yet reached the age of 50, so exactly from their 45th birthday to the day before their 50th birthday. Marathon running is not normally seeded into age divisions so all of these records were set in marathon race open to most other age groups.

;Key:

{{legend2|#f6F5CE|Incomplete information|border=solid 1px #AAAAAA}}

class="wikitable"
Time !Athlete !Nationality !Birthdate !Age !Location !Date !Ref
style="background:#cef6f5;" \|2:09:12 \|Mark Kiptoo \|{{flagu\|Kenya}} \|21 June 1976 \|{{Ayd\|1976\|6\|21\|2023\|4\|23}} \|Zürich \|23 April 2023 \|{{cite web\|title=Jubiläum wird zum Tag der Rekorde\|url=https://www.runnersworld.de/news-fotos/zuerich-marathon-2023/\|website=runnersworld.de\|author=Patrick Brucker\|language=German\|date=24 April 2023\|access-date=3 October 2023}}
2:14:23 \|Bernard Lagat \|{{flagu\|United States}} \|12 December 1974 \|{{Ayd\|1974\|12\|12\|2020\|2\|29}} \|Atlanta \|29 February 2020 \|
bgcolor=#f6F5CE \|2:12:47 \|Kenneth Mungara \|{{flagu\|Kenya}} \|7 September 1973 \|{{Ayd\|1973\|9\|7\|2019\|2\|18}} \|Hong Kong \|18 February 2019 \|
bgcolor=#f6F5CE \|2:15:29 \|Reuben Chesang \|{{flagu\|Kenya}} \|22 December 1962 \|{{Ayd\|1962\|12\|22\|2009\|10\|4}} \|St. Paul \|4 October 2009 \|
bgcolor=#f6F5CE \|2:14:16 \|Jackson Kipngok \|{{flagu\|Kenya}} \|16 August 1960 \|{{Ayd\|1960\|8\|16\|2006\|3\|5}} \|Torreón \|5 March 2006 \|
2:15:51 \|Kjell-Erik Stahl \|{{flagu\|Sweden}} \|17 January 1946 \|{{Ayd\|1946\|1\|17\|1991\|9\|29}} \|Berlin \|29 September 1991 \|
2:16:58 \|Kjell-Erik Stahl \|{{flagu\|Sweden}} \|17 January 1946 \|{{Ayd\|1946\|1\|17\|1991\|6\|1}} \|Stockholm \|1 June 1991 \|{{Cite web\|title=Marathon Rankings for Ages 45-49\|url=https://www.arrs.run/Veterans/VR2_Mara.htm\|work=ARRS\|access-date=4 October 2023}}
2:17:29 \|Jack Foster \|{{flagu\|New Zealand}} \|23 May 1932 \|{{Ayd\|1932\|5\|23\|1978\|10\|22}} \|New York City \|22 October 1978 \|
2:20:12 \|Erik Östbye \|{{flagu\|Sweden}} \|25 January 1921 \|{{Ayd\|1921\|1\|25\|1967\|11\|26}} \|Haninge \|26 November 1967 \|
2:33:03 \|Viktor ("Väinö") Muinonen \|{{flagu\|Finland}} \|30 December 1898 \|{{Ayd\|1898\|12\|30\|1946\|7\|21}} \|Ruokolahti \|21 July 1946 \|

class="wikitable"

Time

!Athlete

!Nationality

!Birthdate

!Age

!Location

!Date

!Ref

style="background:#cef6f5;"

|2:09:12

|Mark Kiptoo

|{{flagu|Kenya}}

|21 June 1976

|{{Ayd|1976|6|21|2023|4|23}}

|Zürich

|23 April 2023

|{{cite web|title=Jubiläum wird zum Tag der Rekorde|url=https://www.runnersworld.de/news-fotos/zuerich-marathon-2023/|website=runnersworld.de|author=Patrick Brucker|language=German|date=24 April 2023|access-date=3 October 2023}}

2:14:23

|Bernard Lagat

|{{flagu|United States}}

|12 December 1974

|{{Ayd|1974|12|12|2020|2|29}}

|Atlanta

|29 February 2020

bgcolor=#f6F5CE

|2:12:47

|Kenneth Mungara

|{{flagu|Kenya}}

|7 September 1973