Although Zimri was eliminated, "half of the people" supported Tibni in opposition to Omri. It took Omri some years to subdue Tibni and at last proclaim himself undisputed king of Israel in the 31st year of Asa, king of Judah (1 Kings 16:21-23).
Because Omri was not a devout follower of God, the writer of the Book of Kings minimized his accomplishments. While the writer acknowledges Omri built his new capital Samaria on a hill he bought from Shemer (16:24), he omits any mention of the widespread public construction both Omri and his son Ahab commissioned during their reigns. Israel Finkelstein and his student Norma Franklin have identified monumental construction at Samaria, Jezreel, Megiddo and Hazor similar in design and build, including twelve sets of mason marks shared between the archaeological sites.
Omri's rule over Israel was secure enough that he could bequeath his kingdom to Ahab, thus beginning a new dynasty (sometimes called the Omrides), and his descendants not only ruled over the kingdom of Israel for the next forty years, but also briefly over Judah. He was significant enough that his name is mentioned on a stele erected by Mesha, king of Moab, who records his victory over a son of Omri -- but omits the son's name. Thomas L. Thompson (The Bible in History), however, interprets the Mesha stele as suggesting that Omri is an eponym, or legendary founder of the kingdom rather than an historical person. Most archaeologists reject this interpretation, seeing Omri as historical.
On the other hand, peace with Sidon also resulted in the penetration of Phoenician religious ideas into the kingdom and led to a kulturkampf between traditionalists (as personified by the prophet Elijah and his followers) and the aristocracy (as personified by Omri's son and heir Ahab and his consort Jezebel). In foreign affairs, this period paralleled the rise of the Kingdom of Aram based in Damascus, and Israel soon found itself at war in the northeast. Most threatening, however, was the ascendancy of Assyria, which was beginning to expand westward from Mesopotamia: the Battle of Qarqar (853 BC), which pitted Shalmaneser III of Assyria against a coalition of local kings, including Ahab, was the first clash between Assyria and Israel. It was the first in a series of wars that would eventually lead to the destruction of the Kingdom of Israel in 722 BC and the reduction of the Kingdom of Judah to an Assyrian tributary state.
In the present-day Israeli society, "Omri" is quite a common male name, which would have been unthinkable in a traditional Jewish milieu. (The same is true for the name "Nimrod", another Biblical character negatively regarded by pre-Zionist Jewish tradition.) Omri Sharon, the elder son (and close political associate) of former PM Ariel Sharon seems the most well-known among present bearers of the name. Omri Katz is an Israeli-American actor, born in Los Angeles to Israeli parents.