The 2015 Connecticut Open was a women's tennis tournament played on outdoor hard courts. It was the 47th edition of the Connecticut Open, and part of the Premier Series of the 2015 WTA Tour. It took place at the Cullman-Heyman Tennis Center in New Haven, Connecticut, United States, from August 23 through August 29. It was the last event of the 2015 US Open Series before the 2015 US Open.

Points and prize money

Singles main-draw entrants

Country	Player	Rank*	Seed
ROU	Simona Halep	3	1
CZE	Petra Kvitová	4	2
DEN	Caroline Wozniacki	5	3
CZE	Lucie Šafářová	6	4
CZE	Karolína Plíšková	7	5
SUI	Timea Bacsinszky	14	6
POL	Agnieszka Radwańska	15	7
ITA	Sara Errani	16	8

The following players received wildcards into the singles main draw:

The following player received entry using a protected ranking:

The following players received entry from the qualifying draw:

The following player received entry as a lucky loser:

Before the tournament

Country	Player	Country	Player	Rank*	Seed
SLO	Katarina Srebotnik	RUS	Elena Vesnina	14	1
USA	Raquel Kops-Jones	USA	Abigail Spears	31	2
TPE	Chan Hao-ching	AUS	Casey Dellacqua	48	3
GER	Julia Görges	CZE	Lucie Hradecká	60	4

The following pair received a wildcard into the doubles main draw:

^ ^a ^b "Rankings explained". WTA. Archived from the original on December 14, 2012. Retrieved August 21, 2015.
^ "2015 Connecticut Open Main Draw Singles" (PDF). wtatennis.com. Retrieved August 27, 2015.
^ "2015 Connecticut Open Qualifying Singles" (PDF). wtatennis.com. Retrieved August 27, 2015.
^ "2015 Connecticut Open Main Draw Doubles" (PDF). wtatennis.com. Archived from the original (PDF) on September 6, 2015. Retrieved August 27, 2015.