Last NameOBRIEN

Key Findings

• Popularity: Obrien is the 185th most popular first name in the U.S., placing it among the top 100% all first names.
• Population: An estimated 165 thousand Americans bear the name Obrien. Based strictly on 100 years of Social Security Administration (SSA) baby name records, the living population with this name is roughly .
• Frequency: Approximately 52 out of every 100,000 Americans are named Obrien.
• Usage: It is almost always used as a last name (100% of the time).