It is impossible to know exactly how many people God killed in the Bible. The number of people who he drowned in a flood, had burnt to death in Sodom & Gomorrah, had killed for being first-born Egyptians or put to death at his hands in other ways have all gone uncharted. It is impossible to tally up all, or even most, of the people God killed in the Bible but there are some stories in the Bible that tells us exactly how many were killed by him. Here's a list, originated by Steve Wells, of most the body count numbers found in the good book.

[from http://dwindlinginunbelief.blogspot.com]

	SAB, Brick Testament	Number Killed	Cummulative Total
Lot's wife for looking back	Gen.19:26, BT	1	1
Er who was "wicked in the sight of the Lord"	Gen.38:7, BT	1	2
Onan for spilling his seed	Gen.38:10, BT	1	3
For dancing naked around Aaron's golden calf	Ex.32:27-28, 35, BT	3000	3003
Aaron's sons for offering strange fire before the Lord	Lev.10:1-3, Num.3:4, 26:61, BT	2	3005
A blasphemer	Lev.24:10-23, BT	1	3006
A man who picked up sticks on the Sabbath	Num.15:32-36, BT	1	3007
Korah, Dathan, and Abiram (and their families)	Num.16:27, BT	12+	3019+
Burned to death for offering incense	Num.16:35, 26:10, BT	250	3269+
For complaining	Num.16:49, BT	14,700	17,969+
For "committing whoredom with the daughters of Moab"	Num.25:9, BT	24,000	41,969+
Midianite massacre (32,000 virgins were kept alive)	Num.31:1-35, BT	90,000+	131,969+
God tells Joshua to stoned to death Achan (and his family) for taking the accursed thing.	Joshua 7:10-12, 24-26, BT	5+	131,974+
God tells Joshua to attack Ai and do what he did to Jericho (kill everyone).	Joshua 8:1-25, BT	12,000	143,974+
God delivered Canaanites and Perizzites	Judges 1:4, BT	10,000	153,974+
Ehud delivers a message from God: a knife into the king's belly	Jg.3:15-22, BT	1	153,975+
God delivered Moabites	Jg.3:28-29, BT	10,000	163,975+
God forces Midianite soldiers to kill each other.	Jg.7:2-22, 8:10, BT	120,000	283,975+
The Spirit of the Lord comes on Samson	Jg.14:19, BT	30	284,005+
The Spirit of the Lord comes mightily on Samson	Jg.15:14-15, BT	1000	285,005+
Samson's God-assisted act of terrorism	Jg.16:27-30, BT	3000	288,005+
"The Lord smote Benjamin"	Jg.20:35-37, BT	25,100	313,105+
More Benjamites	Jg.20:44-46	25,000	338,105+
For looking into the ark of the Lord	1 Sam.6:19	50,070	388,175+
God delivered Philistines	1 Sam.14:12	20	388,195+
Samuel (at God's command) hacks Agag to death	1 Sam.15:32-33	1	388,196+
"The Lord smote Nabal."	1 Sam.25:38	1	388,197+
Uzzah for trying to keep the ark from falling	2 Sam.6:6-7, 1 Chr.13:9-10	1	388,198+
David and Bathsheba's baby boy	2 Sam.12:14-18	1	388,199+
Seven sons of Saul hung up before the Lord	2 Sam.21:6-9	7	388,206+
From plague as punishment for David's census (men only; probably 200,000 if including women and children)	2 Sam.24:13, 1 Chr.21:7	70,000+	458,206+
A prophet for believing another prophet's lie	1 Kg.13:1-24	1	458,207+
God delivers the Syrians into the Israelites' hands	1 Kg.20:28-29	100,000	558,207+
God makes a wall fall on Syrian soldiers	1 Kg.20:30	27,000	585,207+
God sent a lion to eat a man for not killing a prophet	1 Kg.20:35-36	1	585,208+
Ahaziah is killed for talking to the wrong god.	2 Kg.1:2-4, 17, 2 Chr.22:7-9	1	585,209+
Burned to death by God	2 Kg.1:9-12	102	585,311+
God sends two bears to kill children for making fun of Elisha's bald head	2 Kg.2:23-24	42	585,343+
Trampled to death for disbelieving Elijah	2 Kg.7:17-20	1	585,344+
Jezebel	2 Kg.9:33-37	1	585,355+
God sent lions to kill "some" foreigners	2 Kg.17:25-26	3+	585,358+
Sleeping Assyrian soldiers	2 Kg.19:35, 2 Chr.32:21, Is.37:36	185,000	770,358+
Saul	1 Chr.10:14	1	770,359+
God delivers Israel into the hands of Judah	2 Chr.13:15-17	500,000	1,270,359+
Jeroboam	2 Chr.13:20	1	1,270,360+
"The Lord smote the Ethiopians."	2 Chr.14:9-14	1,000,000	2,270,360+
God kills Jehoram by making his bowels fall out	2 Chr.21:14-19	1	2,270,361+
Ezekiel's wife	Ezek.24:15-18	1	2,270,362+
Ananias and Sapphira	Acts 5:1-10	2	2,270,364+
Herod	Acts 12:23, BT	1	2,270,365+

Final Total: 2,270,365 by God

So far there is a total of 2,270,365 for just the documented deaths caused by God in the Bible. This number is obviously an extremely small percentage of total amounts of people he had killed in the Bible but again, these are only ones where the specific number was documented. How does this compare with Satan, how many did he kill in the Bible? To best knowledge there are only ten people that Satan killed and even these he shares with God since God allowed him to do this as a part of a bet. The only documented account of Satan killing anyone is found in Job 1:1-9 and is that of the seven sons and three daughters of Job. When you compare 10 to 2,270,365+ it makes it quite difficult to still label Satan as the "bad guy."

Seven sons and three daughters of Job

Job 1:1-9

10

10

Final Total: 10 by Satan