The 2023 Belgian Indoor Athletics Championships (, ) was the year's national championship in indoor track and field for Belgium. It was held on Sunday 19 February at the Flanders Sports Arena in Ghent. A total of 25 events, 13 for men and 12 for women, were contested. It served as preparation for the 2023 European Athletics Indoor Championships.
Two Belgian indoor records were broken at the competition: Imke Vervaet ran 23.26 seconds to win the women's 200 metres and Jolien Boumkwo won the women's shot put with 17.87 m.