In 1889, one could only win the World Championships by winning all three distances. If no one won all three distances, no winner would be declared. Silver and bronze medals were not awarded.
In the years 1890–1907, one could only win the World Championships by winning at least three of the four distances, so there would be no World Champion if no skater won at least three distances. Silver and bronze medals were never awarded.
In the years 1908–1925, ranking points were awarded (1 point for 1st place, 2 points for 2nd place, and so on); the final ranking was then decided by ordering the skaters by lowest point totals. The rule that a skater winning at least three distances was automatically World Champion was still in effect, though, so the ranking could be affected by that. Silver and bronze medals were awarded now as well.
In the years 1926–1927, the ranking points on each distance were percentage points, calculated from a skater's time and the current world record time. Apart from that, the system used was the same as in the immediately preceding years.
Since 1928, the samalog system has been in use. However, the rule that a skater winning at least three distances was automatically World Champion remained in effect until (and including) 1986. This rule was applied in 1983 when Rolf Falk-Larssen from Norway won three distances and thus become World Champion despite after end of fourth distance (10,000 m) he had a worse samalog score than silver medalist Tomas Gustafson from Sweden.
Sven Kramer from Netherlands has won a total of nine world championships, in 2007, 2008, 2009, 2010, 2012, 2013, 2015, 2016 and 2017. He also hold records for total number of medals (12) by winning bronze medals in 2005, 2006 and 2019. Before Kramer, Clas Thunberg from Finland and Oscar Mathisen from Norway held the record with five world championships.
Sven Kramer has won four consecutive world championships, in 2007, 2008, 2009 and 2010.
The youngest World Allround Champion is Eric Heiden from the United States who won his first of three world allround titles in 1977 at age 18.
The oldest World Allround Champion is Clas Thunberg from Finland who won his fifth and last world allround title in 1931 at age 37.
Roberto Sighel from Italy hold record by number of participations in the championships (16 times in 1987–2002).
The biggest point margin between the winner and the second placed skater at the end of competition is 4.832 points between Eric Heiden from the United States and Jan Egil Storholt from Norway in 1979.
At the 1983 championships, Rolf Falk-Larssen from Norway won three distances and thus become World Allround Champion in accordance with then-existing rule. Being de-facto champion, he finished in 13th place at final distance (10,000 m) and in second place in points classification by losing 0.424 points to Tomas Gustafson from Sweden who eventually become silver medalist. Without taking into account this case, the smallest winning margin between the champion and the runner-up is 0.042 points between Soviet skaters Oleg Goncharenko and Robert Merkulov in 1956.
Eric Heiden and Shani Davis (both from the United States) are only men's speed skaters who become champions both at the World Allround and the World Sprint Championships. Heiden won three World Allround Championships in 1977–1979 and four World Sprint Championships in 1977–1980. He remained the only men's speed skater who win both championships in one calendar year by firstly achieving this feat in 1977 and then repeating this success in 1978 and 1979. Shani Davis is the only men's speed skater who won world titles at three different championships – World Allround Championships (2005 and 2006), World Sprint Championships (2009) and World Single Distances Championships (8 gold medals in 2004–2015).
^Lundberg won his first allround title in 1946 at the unofficial World Championships.
^Pajor used to skate for Hungary until he defected in 1949. From then on the ISU allowed him to participate as an independent skater representing the ISU as he did in 1951. In 1952 he represented Sweden at the European Allround Championships in Östersund in Sweden winning the bronze medal in the overall standings.
^Until 1995 Veldkamp skated for the Netherlands. From 1996 he skated for Belgium in order to avoid having to participate in Dutch qualification trials for the major tournaments.