| Date: | July 4 – July 10 |
| Edition: | 4th |
| Category: | ITF Women's Circuit |
| Surface: | Clay – outdoors |
| Location: | Waterloo, Ontario, Canada |
| Venue: | Waterloo Tennis Club |
| Champs: |  Sharon Fichman |
| Champd: |  Alexandra Mueller / Asia Muhammad |
| After Name: | Cooper Challenger |
| Main Name: | Waterloo Challenger |
The 2011 WOW Tennis Challenger was a professional tennis tournament played on outdoor clay courts. It was the 4th edition of the tournament and part of the 2011 ITF Women's Circuit, offering a total of $50,000 in prize money. It took place in Waterloo, Ontario, Canada between July 4 and July 10, 2011.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Alison Riske | 115 | 1 | ||
 Ukraine | Tetiana Luzhanska | 192 | 2 | |
| Zhang Ling | 198 | 3 | ||
 Israel | Julia Glushko | 200 | 4 | |
| Canada | Sharon Fichman | 245 | 5 | |
| Chanel Simmonds | 252 | 6 | ||
| Chichi Scholl | 271 | 7 | ||
| Hsu Wen-hsin | 284 | 8 |
The following players received wildcards into the singles main draw:
Élisabeth Abanda Sonja Molnar Kimberley-Ann Surin Carol ZhaoThe following players received entry from the qualifying draw:
Victoryia Kisialeva Elizabeth Lumpkin Diana Ospina
Nicola SlaterSee main article: 2011 WOW Tennis Challenger – Singles. Sharon Fichman def. Julia Boserup, 6–3, 4–6, 6–4
See main article: 2011 WOW Tennis Challenger – Doubles. Alexandra Mueller / Asia Muhammad def. Eugenie Bouchard / Megan Moulton-Levy, 6–3, 3–6, [10–7]