| Date: | 10–16 July (men) 17–23 July (women) |
| Edition: | 4th (men) 2nd (women) |
| Category: | ATP Challenger 100 (men) WTA 125 (women) |
| Draw: | 32S/24Q/16D (men) 32S/16Q/8D (women) |
| Prize Money: | €118,000 (men) $115,000 (women) |
| Surface: | Clay |
| Location: | Iași, Romania |
| Venue: | Baza sportiva Ciric |
| Champms: |  Hugo Gaston |
| Champws: |  Ana Bogdan |
| Champmd: |  Nicolás Barrientos /  Aisam-ul-Haq Qureshi |
| Champwd: | Veronika Erjavec / Dalila Jakupović |
The 2023 Iași Open was a professional tennis tournament played on outdoor clay courts. It was the fourth edition of the men's tournament which is part of the 2023 ATP Challenger Tour[1] and second edition of the women's tournament which is part of 2023 WTA 125 tournaments.[2] It took place in Iași, Romania between 10 and 16 July 2023 for the men and between 17 and 23 July for the women.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Moldova, Republic of | Radu Albot | 107 | 1 | |
 Czech Republic | Tomáš Macháč | 108 | 2 | |
 Hungary | Zsombor Piros | 113 | 3 | |
| Cristian Garín | 124 | 4 | ||
| France | Hugo Gaston | 137 | 5 | |
| France | Enzo Couacaud | 158 | 6 | |
| Czech Republic | Zdeněk Kolář | 173 | 7 | |
 Ukraine | Vitaliy Sachko | 190 | 8 |
The following players received wildcards into the singles main draw:
The following player received entry into the singles main draw using a protected ranking:
The following players received entry into the singles main draw as alternates:
The following players received entry from the qualifying draw:
Sebastian Gima
Kalin Ivanovski Kyrian Jacquet
Àlex Martí Pujolràs
Juan Bautista OteguiThe following player received entry as a lucky loser:
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Romania | Irina-Camelia Begu | 30 | 1 | |
| Romania | Ana Bogdan | 57 | 2 | |
| Hungary | Panna Udvardy | 83 | 3 | |
 Montenegro | Danka Kovinić | 90 | 4 | |
| Simona Waltert | 116 | 5 | ||
| Jil Teichmann | 121 | 6 | ||
 Brazil | Laura Pigossi | 134 | 7 | |
| Tamara Zidanšek | 145 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
İpek ÖzThe following players received entry as lucky losers:
Oana Gavrilă| Country | Player | Country | Player | Rank† | Seed | |
|---|---|---|---|---|---|---|
| Romania | Irina Bara | Romania | Monica Niculescu | 194 | 1 | |
| Romania | Oana Gavrilă |  Australia | Olivia Tjandramulia | 262 | 2 |
The following pair received a wildcard entry into main draw:
See main article: 2023 Iași Open – Men's singles.
Hugo Gaston def. Bernabé Zapata Miralles 3–6, 6–0, 6–4.See main article: 2023 Iași Open – Women's singles.
Ana Bogdan def. Irina-Camelia Begu, 6–2, 6–3See main article: 2023 Iași Open – Men's doubles.
Nicolás Barrientos / Aisam-ul-Haq Qureshi def. Gabi Adrian Boitan / Bogdan Pavel 6–3, 6–3.See main article: 2023 Iași Open – Women's doubles.
Irina Bara / Monica Niculescu 6–4, 6–4
