As a whole, absolutely yes. Individually, some more than others.
I have one sister who I talk to a few times a week minimum, and am closest to her more than anyone else in this world other than my husband and kids. They come first, she comes next

I can tell her anything and she might judge, but she tells me she is judging LOL, and I with her. We are both pretty honest and fortheright with each other. We are two years apart in age - I am the older one - but have really similar personalities and outlooks on a lot of stuff. She is my rock.
I have one sister who is 14 months older than me, but we fought a lot as kids, but got along a lot, too, especially as younger adults. I'm more serious than she is, and she was the partier. I pretty much surpassed her in maturity when I was about 12, which caused a lot of fights. She wanted the perks of being the "big sister" but I took the responsibility and she hated that. We used to spend a LOT of time together when we lived closer together. Certain things/changes get in the way of us being TOO close, though, and although we always are happy to see each other, we don't really talk on the phone or confide in each other a whole lot.
I have a couple other sisters who are much younger and it's always been more of a mother/daughter type relationship than a sister/sister one. But that is OK - they always look to me for advice and help, and I love them unconditionally. I always have a good time around them, and they think I'm hilarious, which I'm sure helps

Their kids are younger than mine, so I can help and give (solicited!) advice based on my experiences but without the "my kid is better than your kid" skewed outlook that a lot of parents tend to have when kids are the same ages.
I have a stepsister who I last saw when she was about 12 and stopped coming over to visit because her father (my stepfather) is pretty much the world's worst human being ever. But I see her on FB, and she is doing well - engaged and planning her wedding. I'm happy for her, but I would not say we are close at all. I probably will not make the short list for her wedding, and I am totally OK with that. She should invite people who are really in her life over some stepsisters who she never sees!
Lastly, I have two brothers. One I have never met. He was given up for adoption before I was born. Sad story, but I won't get into details. The other is my 1/2 brother, who is 14 years younger than me. I raised him as a baby/toddler. His father is my stepfather. Neither he nor my mother had any intention on having a child together and when it happened, they saw having teenage girls in teh house as built-in extra parents and pretty much handed all parenting responsibility to me and my next younger sister. (remember...older sister was the partier!) Since I now refuse to see the stepfather, it makes it kind of hard to keep a good relationship with my brother. But we all try. He has a beautiful baby girl and little guy on the way. I will not let the stepfather get in my way of seeing my nieces and nephews, so we pretend like each other is invisible if we are in a room together and carry on.
All in all, I have to say that my absolute favorite times of the year are when my 4 sisters and my brother and I are all together with all our families. We always get together the weekend before Christmas, for the weekend, at one of our houses. And at least once a year, someone will host an overnight summer party that we all go to. No matter what petty differences we have, we all agree that we love when all 6 of us (and families) are together. Parents are NEVER invited

Just the 6 siblings and families. And we like it that way!