How Long Did They Last?
The Kingdom of Israel existed from 1050 to 930 B.C., a time span of only 120 years. Within this period the four kings who reigned were Saul, David, Ishbosheth (two year overlap with David's rule) and Solomon.
Israel's kingdom split in 930 B.C. forming the Kingdom of Israel (northern ten tribes of Israel) and the Kingdom of Judah (three tribes). The northern kingdom, starting with Jeroboam and ending with Hoshea, numbered twenty kings during its 207 years of existence. The Kingdom of Judah lasted a bit longer, 344 years, during which time nineteen men ruled as king and one woman as queen (Queen Athaliah).
The Richest
The richest of all the kings was Solomon. He ultimately amassed a fortune that has never been equaled by any other human (1Kings 3:10 - 13). The king was easily worth several hundred billion dollars in today's money due to the massive amounts of gold, silver and goods he owned!
How ridiculously wealthy was Solomon above any of the world's kings? He had two hundred golden "targets" (small military defensive shields) created that each required roughly $479,000 worth of gold (assuming a modern gold price of $2,200 per troy ounce, 1Kings 10:16) to make. This set would be valued at $95.8 million U.S. dollars today!
Youngest and Oldest Kings
The youngest of the kings to rule over either Israel or Judah was Joash, who assumed the throne over Judah at the age of seven (2Kings 11:21). The second youngest ruler is Josiah, who was eight years old (22:1) when he began to rule Judah in 640 B.C.
The oldest king to assume the throne is Rehoboam, Solomon's son, who began his reign when he was forty-one (1Kings 14:21). It should be noted, however, that the Bible is silent regarding the age when most rulers came to power.
Longest and Shortest Reigns
The longest reigning of the kings over either Israel or Judah was Manasseh. This evil monarch ruled over Judah for fifty-five years, from 696 to 642 B.C. The shortest reign was that of King Zimri, who ruled for only seven days in 885. He ended his own life, in the city of Tirzah, after the people rebelled against him (1Kings 16:15 - 18).
Women and Children
King Solomon had seven hundred wives and three hundred concubines (1Kings 11:1 - 3) for 1,000 women total! His son Rehoboam had the second most known number of women with eighteen wives and sixty concubines for 78 total.
Rehoboam also hold the record amongst the rulers of Israel and Judah for the most children. He produced twenty-eight sons and sixty daughters for 88 children total (2Chronicles 11:21). The runner-up in this category is King Ahab who produced seventy sons (2Kings 10:1). Since the Bible doesn't mention how many daughters he produced, it is possible that he produced more children than Rehoboam.
Royal Bloodlines
Other than Queen Athaliah, the Kingdom of Judah always had a descendant of David sitting on the throne. The Kingdom of Israel, however, was the exact opposite! Its twenty rulers were from ten distinct bloodlines.
The longest bloodline to rule Israel (northern ten tribes) began with Jehu and ended with Zechariah. This chain of five rulers lasted for 88 years (841 to 753 B.C.). The second longest chain of sovereigns began with Omri and ended with Joram, four kings who ruled a total of only 44 years (885 to 841 B.C.).
Age at Death
Scripture doesn't record the age when, after Israel split into two kingdoms, the Kingdom of Israel's rulers died. It does list, however, the death age for fourteen of Judah's twenty sovereigns from Rehoboam to Zedekiah. The average age of death among these kings is roughly 47 years old.