Birth Order at a Glance
Among the best-known Jenner-Kardashian sisters, Kourtney Kardashian is the oldest, followed by Kim, Khloé, and Kylie. Birth order shapes early roles and public perception, and it remains stable regardless of later media emphasis on younger members. Below are the key dates, public age milestones, and a compact comparison so you can quickly confirm who is older and by how much.
Full Birth Dates and Ages (2025)
To answer which Kardashian sister is the oldest, start with verified birth records. Public sources consistently show the following dates. Ages are calculated from these birth dates to the present and rounded down to full years.
| Sister | Birth Date | Age in 2025 | Notable Public Milestone |
|---|---|---|---|
| Kourtney Kardashian | April 18, 1979 | 46 | First child of Kris and Robert Kardashian |
| Kim Kardashian | October 21, 1980 | 44 | Starred in "Keeping Up with the Kardashians" from 2007 |
| Khloé Kardashian | June 27, 1984 | 41 | Co‑hosted live shows during family television peak |
| Kylie Jenner | August 10, 1997 | 27 | Founded Kylie Cosmetics in 2015 at age 17 |
Quick Comparison
- Oldest: Kourtney Kardashian (born 1979)
- Second: Kim Kardashian (born 1980)
- Third: Khloé Kardashian (born 1984)
- Youngest among the four: Kylie Jenner (born 1997)
Why Birth Order Matters in Public Perception
The title of oldest Kardashian sister has influenced how Kourtney is framed in family narratives: as the de facto leader, the planner, or the grounded presence. Birth order can affect responsibilities shown on screen, such as hosting gatherings or mediating family dynamics. While Kim later emerged as the brand powerhouse, Kourtney’s age and role as the firstborn shaped early family expectations.
Clarifying Common Confusions
Are There Other Older Sisters in the Extended Family?
The Jenner side includes Kendall and Kylie, but Kendall is younger than Kylie. Among the Kardashian-birth sisters specifically—Kourtney, Kim, and Khloé—Kourtney is the oldest. Half‑siblings from Kris Jenner’s remarriages exist, but when people ask “who is the oldest Kardashian sister,” they are typically referring to the original three above.
Do Ages Change Over Time?
Ages update annually, but birth order does not. As of 2025, the ranking remains Kourtney, Kim, Khloé, then Kylie. Public events and milestones continue to reference this order, for example when the family marks a collective birthday or anniversary.
Is the Information Consistent Across Sources?
Yes. Major outlets, biographies, and the family’s own statements list April 18, 1979, for Kourtney; October 21, 1980, for Kim; June 27, 1984, for Khloé; and August 10, 1997, for Kylie. These dates appear consistently in credible publications and reference databases.
Beyond Birth Dates: Context and Legacy
Knowing who is the oldest sister helps contextualize family leadership and narrative arcs in their long‑running reality presence. Kourtney often assumed organizing roles in family events, while Kim leveraged fame into a global brand. Khloé carved a distinct path in media and business, and Kylie became a digital‑era entrepreneur. Each trajectory interacts with, but does not erase, the simple fact of birth order.
Key Takeaways
- Kourtney Kardashian is the oldest of the main Kardashian sisters.
- Kim Kardashian is the second oldest, followed by Khloé Kardashian.
- Kylie Jenner is significantly younger than the other three.
- Birth dates are public and verified; birth order has not changed since their births.
- Their ages and roles continue to evolve, but the ranking remains constant.
Summary
Kourtney Kardashian is the oldest sister among Kourtney, Kim, Khloé, and Kylie. Their birth dates are well‑publicized and stable: 1979, 1980, 1984, and 1997 respectively. This clear birth order is unlikely to change and provides a factual baseline whenever questions about age and seniority within the family arise.
FAQ
Reader questions
Who is the oldest Kardashian sister overall?
Kourtney Kardashian is the oldest among the core Kardashian sisters. If extended to all children of Kris and Caitlyn Jenner, the same conclusion holds, since any Jenner siblings are younger than Kourtney.
What are the exact birth dates of each sister? Kourtney: April 18, 1979. Kim: October 21, 1980. Khloé: June 27, 1984. Kylie: August 10, 1997. Does Kylie Jenner have any older full sisters in the Kardashian context?
No, Kylie’s full sisters from the Jenner side are Kendall, who is younger than Kylie, and the Kardashian sisters listed above, who are older.
How does the half‑sibling situation affect the answer?
Kourtney, Kim, and Khloé share the same parents, making the birth order among them direct and unambiguous. Half‑siblings do not alter this ranking for the question as commonly understood.