This　paper　investigates　the　behavior　of　high-strength　circular　concrete-filled　steel　tube　(CFST)　short　columns.　An　experimental　database　consisting　of　87　tests　conducted　on　high-strength　circular　CFST　short　columns　was　compiled,　and　gaps　in　the　existing　research　were　identified.　A　total　of　20　tests　were　then　conducted　to　address　the　gaps　in　the　database.　The　test　parameters　were　the　diameter-to-thickness　ratio　of　the　steel　tubes　D/t,　the　yield　stress　of　steel　Fy,　and　the　compressive　strength　of　concrete　fc′.　The　tests　indicated　that　the　strength　of　high-strength　circular　CFST　short　columns　increases　with　increasing　Fy　and　fc′,　but　decreases　with　increasing　D/t.　All　tested　high-strength　circular　CFST　short　columns　had　acceptable　ductility.　Four　of　the　specimens　did　not　have　any　strength　degradation,　while　the　other　16　specimens　retained　at　least　70%　of　their　strength　at　strains　of　5%.　Results　from　the　tests　conducted　in　this　research　were　combined　with　those　from　the　compiled　database;　the　combined　results　were　used　to　evaluate　the　applicability　of　current　design　equations　for　estimating　the　cross-sectional　strength　of　high-strength　circular　CFST　columns.　The　evaluations　indicated　that　the　Japanese　code　provides　the　most　accurate　estimation.　©　2019　American　Society　of　Civil　Engineers.