|Born||24 May 1978|
|Highest ranking||No. 492 (12 October 1998)|
|Career titles||3 ITF|
|Highest ranking||No. 362 (13 May 1996)|
Hanna-Katri Aalto (born 24 May 1978) is a Finnish former professional tennis player.
Aalto, who was raised in the town of Kajaani, competed on the professional tour in the late 1990s. Retiring in 2000, she then played a year of college tennis in the United States for the University of Mississippi.
Between 1995 and 2000, Aalto represented the Finland Fed Cup team in a total of 20 ties, winning ten singles and three doubles rubbers. Her best ranked singles opponent beaten was Britain's Julie Pullin in 2000.
|Runner-up||1.||21 April 1996||Elvas, Portugal||Hard||Kirsi Lampinen|| Claire Taylor
|Winner||1.||28 April 1996||Azeméis, Portugal||Hard||Kirsi Lampinen|| Kildine Chevalier
|Runner-up||2.||6 July 1997||Lohja, Finland||Clay||Kirsi Lampinen|| Annemarie Mikkers
|Winner||2.||7 June 1998||Antalya, Turkey||Hard||Minna Rautajoki|| Ayami Takase
|Runner-up||3.||24 January 1999||Båstad, Sweden||Hard (i)||Kirsi Lampinen|| Renata Ku?erová
|Winner||3.||23 May 1999||Elvas, Portugal||Hard||Kirsi Lampinen|| Ana Catarina Nogueira
|Runner-up||4.||27 June 1999||Båstad, Sweden||Clay||Kirsi Lampinen|| Minna Rautajoki
|6-1, 2-6, 4-6|
|Runner-up||5.||8 August 1999||Périgueux, France||Clay||Rika Fujiwara|| Selima Sfar