Katarzyna Strusińska, (born 23 November 1987 in Ciechanów, Poland), known professionally as Kasia Struss, is a Polish model.

She went on to finish high school in her home town of Ciechanów before signing with an agency called Avant Management.

She has walked the runway for Marc Jacobs, Viktor & Rolf, John Galliano, Versace, Kenzo, Diesel, DKNY, Burberry Prorsum, Louis Vuitton, Alessandro Dell'Acqua, Sonia Rykiel, Gareth Pugh, Julien Macdonald, Victoria's Secret and many more.

In 2007/2008, Struss opened shows for Nina Ricci, Dries Van Noten, Doo.Ri, Giambattista Valli, PHI, Costume National, Balenciaga, Yves Saint Laurent, Jil Sander, Sinha Stanic, Jill Stuart, Loewe, and Wunderkind[citation needed], and closed shows for Jil Sander, Chloé, Giambattista Valli, Thakoon, Richard Chai, Christopher Kane, and Doo.Ri.

[citation needed] Struss has shot ad campaigns for Gucci, Dolce & Gabbana, Christian Dior, Valentino, Miu Miu, Hugo Boss, Costume National, Kenzo, Bottega Veneta, Alberta Ferretti, Chloé, Mulberry, Pringle of Scotland, Jil Sander, H&M, Express and Costume National.