Well, we are everywhere, generally speaking, but not likely in certain venues.
If you work or attend classes or go to meetings, some of the people there would be HSPs. Your next-door neighbor could be a HSP. They may not even know they are HSPs, but they usually know they are different from other people. They don’t wear signs (it’s not advisable to call undue attention to oneself).
Two-thirds of HSPs are introverts, so tend to be more quiet and soft-spoken and keep to themselves more. HSPs tend to be more empathetic to others, notice details that others miss, are more thoughtful and discerning. Some HSPs are more extroverted and outgoing but tend to have similar sensitivities and do get overwhelmed and need to then withdraw and recharge.
You are more likely to find HSPs in libraries and bookstores, museums, art galleries, parks, nature, and groups, like Sierra Club or other environmental interest groups, etc. Less likely places are bars, sporting events, any place with crowds and noise, groups of people who are loud and abrasive.
You may need to take the initiative to get to know someone who is more introverted (someone has to take the first step). Use your intuition and empathy to spot people who are more like yourself. Go to events that you are interested in (book groups, volunteers, classes, arts/crafts, etc.). If you pay attention you will spot other possible HSPs. Like any relationship, it can take lots of time and energy to develop a good friendship with someone.
Where else can you find other HSPs? You might consider joining a Meetup Group http://www.meetup.com in your area. They have groups for any interest that you can think of.
Can you think of any other places? I’m interested in any thoughts or comments that you have.