How Old Is Kourtney Kardashian? Age, Birthday and Timeline (2026)

How old is Kourtney Kardashian right now? As of June 26, 2026, the answer is straightforward: Kourtney Kardashian is 47 years old. She was born on April 18, 1979, in Los Angeles, California, and she will turn 48 on April 18, 2027. That birth date — confirmed by authoritative biographical sources including Biography.com and reported consistently by People — is the anchor for every age calculation fans, journalists, and search engines rely on when the question spikes around her birthday, new season premieres, and major Poosh or Lemme launches.

This guide is a Pillar I bio reference page: verified birth date, current age math, zodiac sign, birthplace context, and a decade-by-decade look at how old Kourtney Kardashian was at major career milestones. We are not covering net worth estimates, relationship timelines, or family deep dives here — those belong to sibling USA Celebs pillars. What follows is the clean, sourced answer to one of the most searched Kardashian age queries in reality television and pop culture.

How Old Is Kourtney Kardashian in 2026?

On and after April 18, 2026, Kourtney Kardashian is 47. Before April 18, 2026, she was 46. The math is simple: subtract 1979 from 2026 to get 47, then subtract one year only if today’s date has not yet reached April 18. On June 26, 2026 — well after her April birthday — the correct answer to how old is Kourtney Kardashian today is 47.

Search interest in her age tends to spike twice a year — on April 18 itself and whenever a new season of the family’s reality franchise premieres, she launches a Poosh collection or Lemme supplement line, or returns to headlines with a lifestyle or wellness story that prompts “how old was she when…” retrospectives. Because her birth year is 1979, quick mental math often lands on 47 in 2026, and because her birthday falls in Q2, most of the calendar year she is already that age. Journalists and fact-checkers still apply the birthday cutoff rule for January-through-April searches. Getting that detail wrong is one of the fastest ways to lose credibility on a bio page.

Kourtney Kardashian Birth Date and Verified Sources

Biography.com lists Kourtney Kardashian’s full birth date as April 18, 1979, and notes her Los Angeles roots before she rose from a family reality series to a lifestyle, wellness, and media brand of her own. People magazine’s long-running coverage of the Kardashian-Jenner family likewise treats that date as established fact across profiles, birthday posts, and event reporting. USA Celebs relies on those types of authoritative biographical outlets — not fan wikis or unsourced social posts — when publishing age reference pages.

Her birth name is Kourtney Mary Kardashian — the name her parents Robert Kardashian and Kris Jenner gave her in Los Angeles before she became the eldest Kardashian sister in modern reality television. She is an American media personality, entrepreneur, and fashion influencer of Armenian descent on her father’s side. None of that changes the birth-date arithmetic: 1979 → 45 before April 18, 2024; 46 on and after April 18, 2024; 46 before April 18, 2025; 47 on and after April 18, 2025; 47 throughout June 2026 after her April birthday.

How to Calculate How Old Kourtney Kardashian Is

There are three reliable methods to answer how old is Kourtney Kardashian on any given day:

• Year minus birth year, adjusted for birthday: If today’s month/day is on or after April 18, age = current year − 1979. If before April 18, subtract one.
• Online age calculators: Enter April 18, 1979, and the calculator returns exact years, months, and days — useful for “how old was she on [specific premiere date]” questions.
• Official biographical profiles: Biography.com and major outlets like People restate the birth date whenever they publish birthday or milestone pieces, which indirectly confirms the age band for that calendar year.

Example for June 26, 2026: 2026 − 1979 = 47, and June 26 is after April 18, so Kourtney Kardashian is 47. Example for April 17, 2026: she is still 46 because her birthday has not yet arrived this year. Example for December 15, 2026: she is 47 because her birthday already passed this year.

Zodiac Sign, Birthplace, and Bio Context

April 18 places Kourtney Kardashian under the Aries zodiac sign in Western astrology — a detail fans often pair with age searches even though astrology is not a verified biographical source. Biography.com lists her birthplace as Los Angeles, California, where she grew up as the eldest daughter of Robert and Kris Kardashian alongside siblings Kim, Khloe, and Rob.

Understanding birthplace and early Los Angeles years helps explain why age milestones in her career feel dramatic: she was the eldest sister on a record-breaking reality franchise while in her late twenties and thirties, which makes “how old was she when Keeping Up premiered” and “how old was she when Poosh launched” among the top recurring age searches in her catalog.

How Old Was Kourtney Kardashian at Major Career Milestones?

Fans rarely stop at today’s number. They want age-at-milestone context. Below are widely reported career beats with ages calculated from the April 18, 1979 birth date. Dates follow public record and major biographical summaries; exact premiere-day ages may vary by a few days depending on calendar math.

Early Life and Pre-Fame Years (Age 0–27)

Kourtney Kardashian spent her childhood and teenage years in Los Angeles before the family’s reality television breakthrough. Biography.com documents her upbringing in the Kardashian-Jenner household through the 1980s and 1990s, long before cameras followed the family full time.

Keeping Up with the Kardashians Premiere (Age 28)

Keeping Up with the Kardashians debuted in October 2007 when Kourtney Kardashian was 28, keeping “how old was Kourtney Kardashian when KUWTK started” among the top recurring age searches in her origin story. The E! series ran for twenty seasons and transformed the family into global pop culture fixtures.

Poosh Launch (Age 40)

Poosh, her lifestyle and wellness brand, launched in April 2019 when Kourtney Kardashian was 40. The platform’s clean-living mission sent age searches soaring every April birthday season as fans tracked her entrepreneurial evolution from Dash boutiques to digital media.

The Kardashians on Hulu (Age 43)

The Kardashians premiered on Hulu in April 2022 when she was 43, marking the family’s streaming-era reboot after E! ended the original franchise. Each season premiere reignited “how old was Kourtney Kardashian when The Kardashians aired” retrospectives across entertainment media.

Lemme Supplements Launch (Age 43)

Lemme, her wellness supplement line, launched in September 2022 when Kourtney Kardashian was 43, extending her clean-living brand portfolio beyond Poosh into vitamins and gummies. The launch kept age-at-milestone searches active through her mid-forties.

Forties and Franchise Evolution (Age 47–48)

In mid-2026, at age 47 turning 48 on April 18, 2027, Kourtney Kardashian sits in a mature chapter documented by Biography.com and People through new streaming projects, Poosh and Lemme expansions, and continued presence in the family’s evolving media franchise.

Why “How Old Is Kourtney Kardashian” Keeps Trending

Celebrity age searches follow predictable patterns: birthday weeks, new season premieres, product launches, and viral moments that send casual readers to Google for a quick fact. Kourtney Kardashian sits at the intersection of all four. Her mid-April birthday clusters attention in Q2, while franchise renewals, Poosh drops, and Lemme launches keep year-round interest high. Unlike one-hit reality stars, a catalog that spans two decades of television, a lifestyle brand, and a wellness empire means new viewers constantly discover older projects and ask how old she was when each was filmed.

Accurate bio pages also matter for E-E-A-T — Google’s emphasis on experience, expertise, authoritativeness, and trust. Stating she is 48 on June 26, 2026 would be wrong; stating 47 with a clear birthday cutoff demonstrates editorial care. That is why USA Celebs publishes standalone Pillar I age guides rather than burying the number inside gossip roundups.

What This Page Does Not Cover

By design, this article does not include net-worth estimates, dating history, or “where is she now” narrative speculation. USA Celebs addresses those topics in dedicated pillars so bio searches get fast, accurate answers without mixed intent. If you need financial estimates or relationship timelines, use our site search or category archives — this page stays focused on birth date, current age, and milestone math.

Quick Reference: Kourtney Kardashian Age Facts

• Born: April 18, 1979
• Birth name: Kourtney Mary Kardashian
• Age on June 26, 2026 (after April 18): 47
• Turns 48: April 18, 2027
• Next birthday after 2026: April 18, 2027 (turns 48)
• Zodiac: Aries
• Birthplace: Los Angeles, California (per Biography.com)
• Primary sources: Biography.com; People magazine biographical coverage

Explore More on USA Celebs

• Browse our Celebrities archive for more bio and facts reference pages.
• See TV coverage for reality franchise news, premiere cycles, and streaming stories beyond age math.
• Search USA Celebs for related Kardashian bio topics — height, real name, and zodiac guides live in separate Pillar I pages.