Crock Pot Pork Loin (Quick Prep + Super Tender!)

Easy, flavorful, and juicy — this crock pot pork loin recipe is seriously one of those go-to dinners that will have everyone asking for seconds. Whether you’re new to slow cooking or a seasoned pro, this simple recipe uses a handful of everyday ingredients and fills your kitchen with the most comforting aromas. Just prep your pork loin, tuck it in the slow cooker, and forget about it until dinnertime rolls around. It’s perfect for busy weeknights or relaxed weekends when you want dinner to just take care of itself.

Easy, flavorful, and juicy — this crock pot pork loin recipe is seriously one of those go-to dinners that will have everyone asking for seconds. Whether you’re new to slow cooking or a seasoned pro, this simple recipe uses a handful of everyday ingredients and fills your kitchen with the most comforting aromas. Just prep your pork loin, tuck it in the slow cooker, and forget about it until dinnertime rolls around. It’s perfect for busy weeknights or relaxed weekends when you want dinner to just take care of itself.

Thinking back, my best memories of cooking big roasts like this pork loin come straight from my childhood, hanging out with my large Italian family on Sunday afternoons. I remember my Great Aunt pulling out all the stops—those gatherings were rare but oh, so special. She’d make some incredible, home-cooked meals that made the whole house smell amazing.

Honestly, I was probably half paying attention, pretending to play while really soaking up all the kitchen magic happening around me. One meal that sticks in my mind was her juicy pork loin roast slow cooked to perfection, served alongside crisp green beans fresh from the garden, plus warm bakery bread still soft from that morning’s batch. Everyone would sprint to the table ready to dig in.

That slow-cooked pork loin has stuck with me over the years. It’s one of those dishes that’s perfect for prepping ahead, so your slow cooker does all the hard work while you’re out and about. Walking in to that cozy smell of dinner already handled? Yes, please.

If your busy life calls for a meal that’s hands-off but still juicy and delicious, this crock pot pork loin recipe fits the bill perfectly. It’s the kind of slow cooker “set it and forget it” meal that turns a 3 to 5 pound boneless pork loin into tender, flavorful slices or even pulled pork if you want. The ingredients are simple — onions, a splash of oil, some trusty pantry spices, and broth — and the prep only takes about 15 minutes. Then you just let the crock pot work its magic while you get on with your day.

In this post, I’ve got you covered with everything you need to nail this recipe: a detailed ingredients list, step-by-step instructions, cook time suggestions (low for around 6 hours or high for about 4), and tips for hitting that all-important safe internal temperature of 145°F. I’ll also explain how to make it from frozen meat (just add more cooking time), share recommended crockpot sizes (4 to 6 quarts are ideal), and teach you when to peek in on the meat so it comes out perfectly tender.

Apart from the basics, you’ll get my pro tips on keeping the pork perfectly juicy (hello, onion bed trick!), how to make quick gravy from the pan drippings, ideas for turning leftovers into pulled pork sandwiches, plus storage, freezing, and reheating advice so nothing goes to waste. Be sure to scroll down for photos, serving ideas, and the scoop on pork loin versus tenderloin so you’re cooking with confidence every time.

Why This Slow Cooker Shines

This crock pot pork loin recipe is like a slow cooker dream come true — ready to serve tender, juicy meat with almost zero hands-on time. You can count on it for hectic weeknights—see these 30 easy slow cooker recipes for more set-and-forget dinner ideas—or calm weekends. Plus, it’s super versatile: slice it for dinner, shred it for sandwiches, or go all pulled pork style with some BBQ sauce.

• Prepping is a breeze: just spray the crock pot, layer sliced onions, rub the pork with simple spices, add broth, and let it cook slowly.
• Kid-friendly and family-approved: lean, tender meat that slices or shreds easily—great for little eaters and grown-ups alike.
• Feeds a crowd: a 3 to 5 pound loin gives you plenty of servings plus leftovers.
• Leftover flexibility: pair with roasted potatoes, rice, or a quick sautéed zucchini, or toss shredded pork with BBQ sauce for killer sandwiches.
• Works from frozen: yes, you can cook a frozen pork loin in the crock pot — just remember to add some time.

Ingredient List and Measurements

• 3-4 pounds boneless pork loin
• 1 large onion, preferably sweet (like Vidalia)
• 2 tablespoons olive oil
• 1 teaspoon granulated garlic
• 1 teaspoon onion powder
• 1 teaspoon black pepper
• 1 teaspoon salt
• ½ teaspoon paprika
• 2 cups broth (chicken broth works great, but use what you have)
• cooking spray

How to Cook the Pork Loin

1. Spray the bottom and sides of the crock pot well with cooking spray.
2. Slice the onion into even round slices.
3. Optional: quickly sear the pork loin in a hot pan until browned, then proceed to the next step.
4. Arrange the onion slices in the bottom of the crock pot to form a bed.
5. Place the pork loin on top of the onions, fat side facing up.
6. Drizzle the pork loin with olive oil.
7. Sprinkle granulated garlic, onion powder, black pepper, salt, and paprika evenly over the pork and rub gently to coat.
8. If adding vegetables, cut them into large-ish chunks (about half a golf-ball size), nestle them under the pork on top of the onions, and add an extra 1/2 cup broth.
9. Pour 2 cups broth into the crock pot around the pork (not on top).
10. Cover and cook on LOW about 6 hours or on HIGH about 4 hours (for a frozen 5-lb loin, plan roughly 8 hours low or 4 hours high) until the internal temperature reaches 145°F.

11. Check the internal temperature with a quick-read meat thermometer (peek around the 4-hour mark for large roasts) and switch the crock pot to WARM if it reaches 145°F before serving.

    

12. Remove the pork loin from the crock pot and reserve the cooking juices.
13. To make pulled pork: shred the cooked pork with two forks, return shredded meat to the crock pot with about 1/2 cup cooking liquid per cup of meat and 1/2 cup BBQ sauce per pound, and cook on HIGH at least 30 minutes until bubbly and heated through.

Tips for Juicy, Tender Pork

Here’s a neat trick: lining the bottom of your crock pot with onions does double duty. Not only do they add yummy flavor, but they also stop the meat from sticking to the pot. When you switch the slow cooker to “warm” after cooking, it helps keep everything tender and moist.

Want to add veggies like potatoes or carrots? Nestle them under the pork loin, right on top of the onions (the same layering I use in my Slow Cooker Pork Roast). As the pork cooks, its flavorful drippings bless the vegetables below—or you can use those drippings to make an easy gravy.

If you prefer potatoes or carrots on the sides, that works too, and they’ll still be tasty. I usually avoid stacking veggies on top of the pork because they don’t cook evenly that way and miss out on those delicious pork drippings.

Heads up: crock pots vary! Some newer models have vents or just cook hotter, which can mean faster cooking times. To avoid surprises, check your meat a bit early — around 4 hours is a good rule of thumb for a big roast.

If your crock pot has a built-in thermometer, lucky you! That means less guessing. Otherwise, use a quick-read meat thermometer for the best results—just pop the lid quickly and check before closing it back up.

Flavor Swaps and Add-Ins

This pork loin in the crock pot works beautifully as pulled pork too, but be prepared: shredding a 3-5 pound loin makes a ton of pulled pork. I usually reserve that for leftovers after serving sliced pork chops fresh from the crock pot.

After your pork loin is cooked, pull it out along with the cooking juice from the crock pot. Then, shred the meat right on a cutting board using two forks.

Put the shredded pork back in the crock pot, add about half a cup of the cooking liquids or broth for every cup of meat, and stir in half a cup of BBQ sauce per pound of shredded pork.

Let it cook on HIGH in the slow cooker for at least 30 minutes until bubbly and juicy.

Want extra veggies? Yukon or red potatoes, carrots, and celery are great additions — just toss them under the pork along with the onions. When you add veggies, I recommend pouring an extra half cup of broth to keep things nice and moist.

Cut your veggies into large-ish chunks — about half a golf ball size is perfect. Keeping them similarly sized helps them cook evenly without turning to mush.

If you’re making pulled pork from leftovers, take the cooked veggies out before adding BBQ sauce to the shredded pork. Keep those veggies covered and warm while your meat cooks down.

Serving up crock pot pork loin couldn’t be easier. We love it sliced with roasted veggies like garlic parmesan roasted zucchini or a crisp green salad. Corn, roasted potatoes, mashed potatoes, cornbread muffins, or rice all join the plate beautifully. Plus, homemade gravy fresh from the drippings is always a welcome addition.

Sometimes I make a bigger roast just for leftovers. Besides enjoying it as-is, leftover slices can jazz up rice dishes or stir-fries, and shredding some for BBQ pulled pork sandwiches is a game changer.

Storing and Make-Ahead Tips

Make sure to store leftovers within two hours of cooking in airtight containers to keep things fresh. Properly stored, sliced or shredded pork stays tasty in the fridge for 3-4 days.

Want to freeze? Cool the meat fully, then pack in airtight containers or freezer bags. Freeze for up to 3 months. Label portions for easy thawing and reheat.

Here’s how to handle thawing and prepping ahead:

• Thaw frozen portions overnight in the fridge.
• You can prep the onions and seasonings with the raw pork loin in the crock pot insert and refrigerate for up to 24 hours before cooking—this dump-and-go crockpot method makes busy nights easier.

When reheating, heat until the internal temp hits 165°F for safety:

• Oven: Place pork slices or whole pieces in a covered baking dish, add a splash of broth or pan juices, and bake at 325°F for about 15-30 minutes depending on the size.
• Slow cooker: Put pork and 1/4 to 1/2 cup broth or pan juices back in and heat on LOW until warmed through (usually 1-2 hours).
• Microwave: Heat covered in short bursts and stir or turn to heat evenly.

For shredded pulled pork, add a little BBQ sauce or broth when reheating to keep it moist. Vegetables stored with the meat may soften; if you want firmer veggies, store and reheat them separately.

Common Pork Loin Questions

Pork loin and pork tenderloin get mixed up a lot, but they’re different cuts with their own strengths. Pork loin is a wider, larger cut that you can slice like a steak and sometimes has a bone. It’s usually 2 to 5 pounds or more, perfect for slow cooking or roasting low and slow.

Pork tenderloin is smaller, boneless, and thinner — think medallion-sized pieces. It usually runs 1 to 2 pounds and cooks best quickly over high heat.

So if you want roast or a slow cooker-friendly cut, pork loin is your go-to. For an ultra-simple option, try this 5-ingredient crockpot pork roast. If you want something fast on the stove or in the oven, tenderloin is great.

For a quick alternative, check out this tasty Instant Pot Pork Tenderloin With Honey Balsamic Sauce recipe.

Kids can be picky, but pork loin slow cooked in the crock pot is a win. It’s tender, lean, and easy for little ones to enjoy.

You can cut the pork into bite-sized pieces or shred it for easy chewing — great for toddlers and preschoolers too.

Leftovers? Shred on some BBQ sauce and make quick sandwiches that kids (and adults!) will devour. Pair with roasted potato wedges or classic mashed potatoes and you’re set.

Keep in mind cooking times vary with crock pot size and pork loin weight. Roasts between 3 and 5 pounds will cook differently.

A 4-pound loin usually takes around 6 hours on low. The best way to be sure it’s done is with a meat thermometer: look for 145°F internal temp.

After cooking, switch to the warm setting if you’re not ready to serve — this keeps the meat moist thanks to the tasty pan liquid.

Good news: you can cook a frozen pork loin right in the crock pot! Season it like you normally would, then plan for about 4 hours on high or 8 hours on low.

Always check the temperature to make sure it hits 145°F. Cooking time varies, especially with different loin sizes. That timing is based on a 5-pound frozen pork loin.

I’ve heard from readers who’ve had different experiences with crock pot sizes. My recommendation is a 4, 5, or 6-quart crock pot for this recipe — it strikes the perfect balance of liquid and meat. Ideally, your crock pot should be about three-quarters full for even cooking.

If you use a smaller slow cooker (closer to 3 quarts), it’s best for smaller pork loins around 3 pounds, and you’ll want to reduce liquid and check the meat earlier since it cooks faster when the pot is fuller.

For larger crock pots, simply add a bit more liquid, especially if you’re adding extra veggies like carrots or potatoes.

Cooking pork loin fat side up is standard practice — the melting fat bastes the meat as it cooks, adding juicy flavor. You can trim the fat beforehand if you want, but know you’ll lose some of that richness.

Since pork loin is pretty lean to begin with, I usually trim any excess fat after it’s cooked.

Browning your pork loin before slow cooking is a bit of an extra step that really amps up flavor — the same Maillard magic that makes slow cooker beef tips and gravy so rich. If you’re short on time, though, don’t worry — this recipe tastes fantastic even without searing.

Personally, I skip browning when I’m in a rush because the roast is already so big and juicy by the time it’s done. But if you want that deeper flavor, quickly sear it in a hot pan before you place it in the crock pot.