I could just give a big ol’ “yep” to everything everyone else has already said, but I may as well add specifics:
In the town where I went to college, I got catcalls pretty regularly, maybe a couple of times a week, from people in cars, on porches, and occasionally passersby. If I was walking alone after, say, 10pm, it was pretty much a given. These were anywhere from “You’re beautiful” with a creepy stare to “I wanna suck those titties!” I had my ass grabbed a few times, mostly in the bars where I was a server. I got followed a few times, once on foot.
In Chicago, it was similar, but more frequent - probably daily. I also got a lot more actual invitations (“Hey sexy, come home with me.”) and insulted reactions if I ignored them or turned them down (“Fuck you, cunt, you think you’re too good for me?”), neither of which really happened in the college town. I got invitations maybe once a week or so, and insulted reactions about half the time. The catcalls were also more lewd overall. One highlight there was the guy in the dance club who kept trying to rub against me, and finally grabbed my hand from behind me and put it on his dick, which he had taken out of his pants for my convenience. Classy.
For a little while, I commuted in from a far Chicago suburb, and the train station was always empty in the mornings. A guy started showing up when I was alone there, and would sit directly across from me and stare at me. If I got up and stood outside, he would get up and stand facing me, and stare. This happened two or three days in a row, and after that, I always took an earlier or train, or waited a block or so from the station until the train showed up.
In DC, I got seriously lewd comments (“Mmm, pussy, pussy”) and kissy noises a few times a week, because I had to walk past a social club of some kind to get to and from the train, and there was usually a cluster of guys on the sidewalk there. I also got the more mild catcalls pretty much daily.
When I traveled, I found it was most frequent in Spain, about equally lewd in Spain and Prague, and surprisingly rare in Paris. In London I was always with other people, so I can’t really say.
Now that I’m in the suburbs, work in an office, and don’t go out to bars anymore, the worst I get is the occasional “Good MORning!”.
No, it never seemed to matter what I was wearing, be it a cocktail dress or winter coat with hood and scarf.
Yes, it was more frequent in poorer areas, and I’d say very generally speaking, catcalls came largely from white and hispanic guys, while black guys tended more toward propositions.
No, it never happened with guys around. I never made a point of telling guys (or anyone)about it, though, because it never occurred to me they didn’t know. It did come up with my (now) husband one day when I had just gotten some lewd comment before I walked in the door. I looked annoyed, and he asked what was up, and I told him whatever it was the guy had said. He was appalled, and was really surprised to hear that this was just a normal thing for women.
I felt threatened when I was followed, sometimes when I was groped, and when the guy stared me down at the train station. By “threatened” I mean I had the clear impression that the person intended to do something to me and was prepared for me to fight back.
Everthing else, I’d consider harassment, except maybe the milder compliments. If it’s “Hey pretty lady”, that’s merely annoying. If it’s “You’ve got such a cheery smile!” I like it, or at least, usually don’t mind it.
Oh, and I’m 34.