| Date: | 18–24 September 2023 |
| Edition: | 4th |
| Surface: | Hard / Outdoor |
| Location: | Caldas da Rainha, Portugal |
| Category: | ITF Women's World Tennis Tour |
| Prize Money: | $60,000+H |
| Champs: | Petra Marčinko |
| Champd: | Francisca Jorge / Matilde Jorge |
The 2023 Caldas da Rainha Ladies Open was a professional tennis tournament played on outdoor hard courts. It was the fourth edition of the tournament which was part of the 2023 ITF Women's World Tennis Tour. It took place in Caldas da Rainha, Portugal between 18 and 24 September 2023.[1]
See main article: 2023 Caldas da Rainha Ladies Open – Singles.
Léolia Jeanjean, 6–4, 6–1See main article: 2023 Caldas da Rainha Ladies Open – Doubles.
Ashley Lahey / 
Tian Fangran, 6–1, 2–6, [10–7]| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Brazil | Laura Pigossi | 130 | 1 | |
 Spain | Nuria Párrizas Díaz | 135 | 2 | |
| France | Léolia Jeanjean | 146 | 3 | |
 Ukraine | Daria Snigur | 147 | 4 | |
| Céline Naef | 152 | 5 | ||
 United Kingdom | Yuriko Miyazaki | 154 | 6 | |
| Petra Marčinko | 170 | 7 | ||
| France | Fiona Ferro | 186 | 8 |
The following players received wildcards into the singles main draw:
Tian FangranThe following players received entry from the qualifying draw:
Sara Daavettila Amandine Hesse Dalayna Hewitt Ashley Lahey
Elena Malõgina Eden SilvaThe following player received entry as a lucky loser:
