Geertruida "Truus" Christina Baumeister (born October 21, 1907, date of death unknown) was a Dutch freestyle swimmer who competed in the 1928 Summer Olympics.
She was born in Rotterdam.
In 1928 she was eliminated in the first round of the 400 metre freestyle event. She was also a member of the Dutch relay team which was disqualified in the final of the 4 x 100 metre freestyle relay competition.