My kids are slightly older, 9 and 7. The 7 year old goes to bed between 7:30 and 8. I leave her in her room at 7:30 and she's allowed to read until 8 if she wants. Many nights she goes straight to sleep. She's up between 6:30 and 7.
My oldest goes to sleep between 8:30 and 9, however she is a nightowl and we have to wake her up in the morning at 7:30. She'd sleep past 8 if we let her.
Now that they're getting older their activities are getting later at night. Some nights DD#1 has softball until 7:45. Those nights she doesn't get to sleep until closer to 9:30 (sometimes even 10). Luckily this is only once a week and it's now over for the season but it's definitely hard to get them enough sleep when their activities run late.
We also don't do all activities in the evenings. Some of their school programs run late (start at 7 and go past 8:30). We generally skip these. I never understand why they run so late for elementary school. I know our bedtimes are fairly early for their ages but I have to believe we're not the only ones who put their kids to bed this early.