Kateřina Flachsová (born 29 September 1986) is a Czech ice hockey player and alternate captain of HC 2001 Kladno in the Czech Women's Extraliga.

[1] She last represented the Czech Republic in international competition in 2016.

Flachsová's extensive club career has primarily been played in the Czech Women's Extraliga with HC 2001 Kladno.

However, she spent several seasons playing abroad in Austria and Switzerland, first in the Elite Women's Hockey League (EWHL) with the EHV Sabres and, later, in the Leistungsklasse A (LKA) with DHC Langenthal and, after the league was renamed the Swiss Women's Hockey League A (SWHL A; rebranded Women's League in 2020), with SC Reinach Damen.

This biographical article relating to a Czech ice hockey defenceman is a stub.