What kind of snake is this?

[ChickenCanoe]

It looks like a yellow bellied king snake to me.
Definitely not venomous.

http://lmgtfy.com/?q=snakes+of+oklahoma

 

[Elfer]

Bands too even striped for copperhead to me, and would have bit of a neck, then cheeks bow out for a slightly triangle shape. So can't see well enough in pic. to say for sure, but head seems too close to neck diameter

 

[Terrapin13]

Yes, I think it is a bull snake.

 

[sassysarah]

Yellow-bellied Kingsnake Lampropeltis calligaster. Probably got run over by a car on the road. Too bad. They are good snakes.

Googled it and that's what it looks like!

 

[Elfer]

There are water snakes that mimic copperheads, but the ones I used to be afraid of were less distinctly patterned, and had an olive tinge. There are maybe others, though. I'm thinking corn snake.

 

[sassysarah]

It looks like a yellow bellied king snake to me.
Definitely not poisonous.

http://lmgtfy.com/?q=snakes+of+oklahoma

Yeah, I definitely think it's that!

 

[Sea Wolf]

Absolutely, positively NOT any type of poisonous snake. Could be a Bull snake though the ones I have kept were of a different color pattern. Do you remember what the belly looked like? Solid colored? Checkerboard pattern?
Yellow Bellied Kings have different shades of color depending on the region. Some people thing they are 3 different species. Gopher snakes coloring and markings change dramatically near the end of the tail. I don't think it's one of those because the pattern of spots is different.

 

[Elfer]

Non venomous, at any rate. Your pics. show slender body. Copperhead would be a bit plumper at that length.

 

[ChickenCanoe]

I hope you didn't kill it. It is a good snake to have around.

http://www.sci-news.com/biology/yellow-bellied-kingsnake-three-species-04265.html

It used to be yellow bellied but now seems to be reclassified as a mole kingsnake.

 

[Melodychick]

I can’t tell from your picture, because I’m on my phone, but almost all non poisonous snakes have round pupils while poisonous ones have oblong slit like pupils. Of course I’m not getting close enough to check that out! I usually just look at the shape of the head. Yours definitely looks non venomous to me. Here’s a pic of a nonpoisonous snake eating my eggs, you can see the round pupil