Phoebe Catherine Holcroft Watson (née Holcroft; 7 October 1898 – 20 October 1980) was a tennis player from the United Kingdom whose best result in singles was reaching the final of the U.S. Championships in 1929, losing to Helen Wills in straight sets. According to A. Wallis Myers, Watson was ranked in the world top 10 in 1926 and from 1928 through 1930, reaching a career high of world No. 2 in 1929. She was part of the British team that won the Wightman Cup against the United States in 1928 and 1930.