50+ Sister Captions for Instagram, Facebook & TikTok

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Struggling to find the perfect caption for your perfect sister snap? Let us be your favorite (non-bio) sibs and share our best sister-themed caption ideas.

After all, it can be tricky to put into words how much you love (and sometimes hate) your #1 gal… so check out our sisterly caption ideas below for the perfect stress-free solution.

Whether you need a great sister selfie quote, something punny, or motivational sister captions to inspire, we guarantee these sister caption ideas will fit all your needs.

Read on for the full list.

First: All Our Caption Ideas in One Place

We have tons of great caption ideas for you below, but be sure to check out our other roundups for more:

Photo by Elise Wilcox on Unsplash

Short Sister Captions for Instagram, Facebook & TikTok

Sisterly bonds are usually simple and sweet (and sometimes chaotic and turbulent)… but hey, if you want to keep things short and succinct, here are some short sister captions that will do the trick:

My Partner in Crime

Just my sister? Nah. She’s also my bestie

Always better together

Dynamic duo

We go together like PB&J

Sister sister

I love you this much:)

Me and my #1 girlie

Always got your back babe

When we were young

Soul sister

Photo by Hannah Busing on Unsplash

Sister Selfie Captions for Instagram, Facebook & TikTok

Alright, you’ve slayed that sister selfie, now it’s time to slay the caption. Here are some fire sister selfie captions that will go nicely with that perfect snap.

Two is better than one

You’re pretty much my most favorite of all time in the history of ever


Sisters who slay together, stay together

Non-biological sibs

Double the trouble = Sisters in stilettos

Rain or shine

Quite literally, #Twinning

She’s the Mary-Kate to my Ashley

BTBFF: Born together, best friends forever

I’ve always known my worth, but she reminds me to add the tax

Great minds don’t just think alike. They dress alike, too

My sister from another mister

You can’t sit with us

Photo by David Fanuel on Unsplash

Funny Sister Captions for Instagram, Facebook & TikTok

One of the best parts of having a sister is sharing all the silly stuff you do together. Pair those great memories with one of these funny sister captions to show off your goofy bond:

I’ll take a Nerf bullet for you

What do you mean no pets are allowed? This is my sister

My sister has the best sister

In the sibling lottery, I hit the jackpot

Yes, we know how obnoxious we are together. No, we don’t care

…It seemed like a good idea at the time

Sisterly bonds clearly start some days better than other

Jeans almost as good as these genes

If all else fails, just raid your sis’s wardrobe

FYI, she got half her clothes from my closet

She is my best friend. If you break her heart, I’ll break your face

I say I won’t tell anyone, my sister doesn’t count

Shhh… Part of my OOTD came from my sister’s closet

Don’t judge… our mom picked the hair and outfits

Motivational Sister Captions for Instagram, Facebook & TikTok

Looking for something a little more serious? Show your sister some love and spread encouragement with these motivational sister-themed captions.

Together, we’re unstoppable

So lucky to have someone like you

Sometimes family is the people we choose to be closest to us

Nobody has to like us like we have us

Sometimes, all you need is your own kind

I’ve got the best one on my side

Sisters by chance, friends by choice

A loyal sister is worth a thousand friends

Destination sisterhood. Location unknown

My sunshine on a cloudy day

Photo by Joel Muniz on Unsplash

Did we Forget any Sister Captions?

Let us know in the comments what sister Instagram, Facebook or TikTok captions we should add to our list!

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