What's the longest you've been angry at someone

It depends what you mean by "angry"

I've had some people (not a lot but a couple) who I just dislike so much I hope I never see them again. However, I'm not "angry" at them anymore, the anger isn't fresh enough if that makes sense. I just dislike them and wouldn't want to see them in case I get angry fresh over again.

In the literal sense I've only ever been outright angry (to the point where I've wanted to lash out angry) literally no longer than an hour. I guess I'm very mellow and get over most things fast.

I just fear this woman. I'd speak to her if I had any faith that I wouldn't be manipulated again.

There are people I've cut off contact with after their behaviour, but life's too short to keep anger up for long.

Ive been angry at my brother for 22 years. I can see it going on 22 more.

It depends. Over alot of things, most things, people usually get over it and move on after like 2 or 3 days, maybe a week. Even smaller things, within ten minutes to a couple hours, but those are usually over things that people more consider annoyances rather than someone being made downright angry. It all depends, what I wrote above is usually how it works between family, friends, or people who know each other and at least somewhat like each other. After you're annoyed or angry with them for a few hours or a few days, then you usually move on and it's all over and done with.
When it's between people who never really liked each other to begin with, or if it's something between two strangers, or for example, two people that work together but don't know each other and haven't talked before up until they had a conflict. Then how it often works is that when one gets mad at the other, they'd still be mad for a couple days, and then they'd move on. But then the anger or tension may temporarily return whenever they would see that person again, walk past them, or whatever. But the anger would leave them once they're out of sight until the next time they see them. In that sense, it sometimes seems that it's harder to forgive someone when the only time you ever had contact with them, it was negative. But like I said, the tension would only return when you see them, then dissapear again once they're gone. The actual anger part only lasts a couple days just like when it's with family or friends. I, personally though, don't believe in holding grudges with anyone, stranger or family, cause I like to make peace. I'm just writing about how I know alot of people are.
With family or friends with many people, unlike with people that don't really know each other, after a couple days of being mad, the tension will rarely return again because you're feelings towards them will go back to the focus of alot of the good points between you again when you see them. Unless it's been a largely ugly relationship overall, then that's a different story.
There are a few exceptions where the amount of time being angry can last alot longer than a few hours, days, weeks. If there is traumatized feelings from someone that had abused you, molested you, beat you, or abandoned you, especially if it happened when you were very young, then anger and hurt can continue for many years. You could still be traumatized from things like that when you're 50 over something that happened when you were 7. War trauma is another example. I've read about how in recent years, there were still some 80 something and 90 something year olds around still traumatized from World War 2. Unless you got amnesia and your memory has been completely destroyed, you can never really forget things like that.

A few days.

I can't stay angry at anyone for more than a week. My heart is soft. But years ago, I didn't talk to my best friend for a year. Then we made up. I reached out coz it was silly.

38 years and counting

Does it count if you aren't angry anymore, but you know someone is a POS so you take out your anger on them discreetly by screwing with their mail and stuff?

It's not healthy to hold on to feelings of actual anger for long.

It's another thing to decide that someone is a despicable human being you want to have nothing more to do with. My first wife falls into that category, and she's been there for 35 years and counting.

I've come to understand why she behaved the way she did, but I can't forgive her actions, and I really wouldn't piss on her if she was on fire.

I'm half Colombian, if someone betrays my trust there's no going back. I might eventually get around to forgiving the person, but I will never them back.

https://youtu.be/ntwdH3Q54ZY

9 months is a very random option...

all my fuckin life