Jacob Simonsen

{{short description|Danish long-distance runner}}

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Jacob Sommer Simonsen (born 1 January 1995) is a Danish long-distance runner.

In 2019, he competed in the senior men's race at the 2019 IAAF World Cross Country Championships held in Aarhus, Denmark.{{Cite web|title=Senior men's race|url=https://media.aws.iaaf.org/competitiondocuments/pdf/6265/AT-XSE-M-f----.RS6.pdf?v=-1530503012|url-status=live|archive-url=https://web.archive.org/web/20200706223921/https://media.aws.iaaf.org/competitiondocuments/pdf/6265/AT-XSE-M-f----.RS6.pdf?v=-1530503012|archive-date=6 July 2020|access-date=27 June 2020|website=2019 IAAF World Cross Country Championships}} He finished in 93rd place. In the same year, he also represented Denmark at the 2019 Summer Universiade held in Naples, Italy.{{Cite web|title=Athletics Results Book|url=http://universiade2019napoli.microplustiming.com/assets/pdf/ATH_CompleteResultsBook_1_3.pdf|url-status=live|archive-url=https://web.archive.org/web/20200610171901/http://universiade2019napoli.microplustiming.com/assets/pdf/ATH_CompleteResultsBook_1_3.pdf|archive-date=10 June 2020|access-date=10 June 2020|website=2019 Summer Universiade}} He finished in 13th place in the men's half marathon and he won the bronze medal in the men's marathon team event.

He is the current national record holder on the men's marathon distance after running the BMW Berlin Marathon on 29 Sep 2024 in 2:07:51. Thus beating the previous record set by Henrik Jørgensen in 1985 by one minute and 52 seconds.https://www.dr.dk/sporten/atletik/roert-rekordmager-efter-historisk-bedrift-jeg-er-helt-rundt-paa-gulvet#:~:text=S%C3%B8ndag%20den%2029.%20september%202024,%C3%A5r%20gamle%20danmarksrekord%20p%C3%A5%20maratondistancen.