The 2023 Iga Świątek tennis season officially began on 31 December 2022 as the start of the 2023 WTA Tour. Iga Świątek entered the season as the world number 1 player in singles for the first time in her career.

Iga Natalia Świątek is a Polish professional tennis player. She is currently ranked as the world No. 1 in women's singles by the Women's Tennis Association (WTA), having held the position for a total of 103 weeks. Świątek is a four-time major singles champion, having won the French Open in 2020, 2022, and 2023 and the US Open in 2022. She is the first player representing Poland to win a major singles title. She has won a total of 20 singles titles, including the 2023 WTA Finals and nine WTA 1000 titles.