5 Zodiac Signs Most Prone to Infidelity

The topic of infidelity—the breach of trust that shatters relationships—is a complex intersection of psychology, biology, and social opportunity. Yet, for those who seek patterns in human behavior, the celestial map of astrology offers a compelling, if controversial, lens. The question lingers: who is actually more likely to follow through on the temptation to cheat? While astrologers interpret the innate tendencies of each sign differently, one survey relied not on mystical charts, but on raw, measurable user data to reveal a startling pattern. According to a survey conducted by Ashley Madison—the dating platform explicitly known for facilitating extramarital connections—five specific zodiac signs stand out as being disproportionately represented among their members, suggesting a potential correlation between Sun signs and the propensity toward infidelity.

This unique survey bypassed traditional astrological prognostication, relying instead on the straightforward metric of real user birthdays to reveal which signs appeared most frequently among their massive user base. Since each zodiac sign is associated with its own distinct set of traits—governing everything from drive and emotion to preferred communication styles—knowing someone’s Sun sign can offer fascinating insights into their dating preferences, their relationship challenges, and, indeed, their statistical likelihood of exploring connections outside a primary relationship.

Ashley Madison, which has been active since 2002 and currently boasts more than 54 million registered accounts worldwide, provides a unique, large-scale dataset for examining this behavior. The platform reports that sign-ups typically surge around the emotionally charged holiday season. In fact, over the past five years, the platform has seen an alarming eight percent rise in new accounts between December and January. Using this influx of activity, the site’s data team meticulously examined member birthdays from users across major English-speaking territories—the U.S., Canada, the U.K., and Australia—to identify which zodiac signs dominated their extensive registration lists.

So, which signs top the charts for being statistically the most unfaithful, based on this self-selecting dataset? If you’re curious about astrology and its surprising take on the complexities of relational commitment, here are the five zodiac signs that showed the highest numbers on Ashley Madison.

I. The Fixed Earth and Air: Stability and Independence

The top two signs on the list represent modalities that, on the surface, seem contradictory: the Earth sign driven by stability, and the Air sign obsessed with freedom. This highlights the complex, internal friction that often drives extramarital exploration.

1. Capricorn (December 22 – January 19)

The fact that Capricorn tops Ashley Madison’s list often comes as a profound shock to those familiar with basic astrological traits. Capricorns are Earth signs, universally admired for their incredible drive, unwavering discipline, and deep-seated loyalty. Astrologer Suzie Kerr Wright notes that Capricorns instinctively “crave stability and routine in relationships,” finding safety in predictability, which suggests that traditional, committed partnerships should suit them best.

The Shocking Contradiction: The statistical reality, however, paints a different picture. Not only are they the most common sign among Ashley Madison users, but the data also showed them ranking high in terms of engagement and activity with other members.
The Astrological Rationale (The Drive): The underlying astrological interpretation suggests that the very same drive that makes a Capricorn successful in their career—the intense focus on achievement, structure, and reward—may apply to their relationships. When their primary partnership lacks the structure or emotional reward they meticulously build elsewhere, they may view seeking novelty as a highly organized, goal-oriented endeavor, rather than a chaotic lapse of judgment. For a sign driven by status and ambition, an affair can ironically become a secret, self-affirming project.

2. Aquarius (January 20 – February 18)

Aquarius, the fixed Air sign, represents the opposite end of the spectrum: a personality fundamentally known for valuing independence, individuality, and intellectual freedom above all else. Given this predisposition, their strong representation on the platform is far less surprising.

Aversion to Confinement: Even in deeply committed relationships, this Air sign fundamentally dislikes feeling confined, owned, or restricted by convention. They require vast amounts of personal space and intellectual autonomy. When a relationship starts to feel too predictable, too emotionally demanding, or too conventionally structured, the Aquarian impulse is often to seek an escape hatch that allows them to maintain a sense of their unique, unburdened identity.
Intellectual Separation: An affair for an Aquarian is often initially an intellectual or social experiment—a way to connect with a new mind or a different perspective that the primary relationship may lack. The detachment characteristic of Air signs can make it easier for them to separate the physical act from the emotional commitment, allowing them to compartmentalize the infidelity.

II. The Water Signs: Dreamers and Emotional Seekers

The inclusion of these two Water signs highlights how emotional complexity, the pursuit of fantasy, and the innate need for security can paradoxically lead to secretive behavior.

3. Pisces (February 19 – March 20)

Pisces is famously the zodiac’s dreamer, often caught in the liminal space between harsh reality and the fantastical world they have created in their vivid minds. This mutable Water sign is driven by empathy and the constant, subconscious pull of escapism.

The Escapist Lure: For some Pisceans, the intense emotional distress or boredom of a flawed relationship can make the idea of a secret romance a perfect alignment with that imaginative, escapist streak. Infidelity offers a complete, temporary immersion into a fantasy world—a place where problems don’t exist, and the connection is idealized and perfect. This makes them a natural fit for a platform that facilitates the creation of entirely new, unburdened narratives.
The Need for Connection: Pisceans are often highly sensitive and porous to the emotions of others. If they perceive emotional neglect or isolation within their primary bond, they may seek out a deep, empathetic connection elsewhere, viewing the affair as a necessary emotional lifeboat rather than a deliberate betrayal.

4. Cancer (June 21 – July 22)

Cancer completes the top five, and according to some astrologers, this cardinal Water sign should actually rank even higher. Cancer is the sign associated with home, family, profound nurturing, and emotional security. Its presence on the list is deeply counter-intuitive, yet statistically undeniable.

The Need for Security and Nurturing: Cancerians crave a feeling of emotional safety and constant nurturing. When their primary relationship fails to provide that constant, comforting sense of home and security—when the emotional reservoir runs dry—they will seek it elsewhere. An affair for a Cancerian is often a desperate, misguided attempt to recreate the feeling of being cherished and protected.
The Astrological Contention: Astrologer Noella Fe challenges the data’s ranking, stating: “I can see Capricorn being on the list, but I don’t agree they’re number one. Cancers should actually hold that spot. They get bored easily and often keep people waiting without making it clear they’re not the only one.” Ashley Madison’s findings also revealed that Cancers, alongside Capricorns, Scorpios, and Geminis, are among the most active users when it comes to initiating and making new connections, suggesting a high commitment to the behavior once they engage.

III. The Steadfast Wanderer: Taurus

5. Taurus (April 20 – May 20)

Taurus, a fixed Earth sign, is traditionally the epitome of loyalty, stability, and dependability in love. Like Capricorn, its placement on this list is genuinely unexpected, given that the sign is ruled by Venus, often associated with pleasure and harmony.

The Sensual Pull: The Taurean connection to infidelity likely stems not from emotional chaos (like Cancer) or intellectual boredom (like Aquarius), but from a deep, uncompromising sensual and physical drive. Taurus is heavily ruled by the material and physical world. If the physical aspect of their primary relationship becomes routine, unexciting, or neglected, the Taurean need for sensual pleasure and physical affirmation can become an overwhelming, primary motivator for seeking external fulfillment.
Statistical Proof: According to the Ashley Madison data, Taureans are the fourth most present sign on the site, statistically proving that even the most steadfast Bull may sometimes wander when their physical needs are not met with the quality and attention they require.

IV. Beyond the Sun Sign: Context and Conclusion

While the Ashley Madison survey provides a provocative statistical snapshot, it is a self-selecting dataset that cannot be taken as universal proof of astrological destiny. Infidelity remains a complex behavioral choice influenced by a multitude of factors: opportunity, communication failure, personal insecurity, and, yes, individual traits.

The surprise many feel at seeing signs like Capricorn and Taurus so high on the list serves as a crucial reminder: no sign is truly immune to temptation. The survey suggests that the traits we admire—drive, sensitivity, loyalty, or stability—can become the very vulnerabilities that lead a person down a path of betrayal when those needs are not met within the primary relationship.

The true value of this astrological data is not in blaming the stars, but in recognizing that understanding your Sun sign’s core needs and challenges can provide valuable insight into where your own personal friction points—and potential vulnerabilities—might lie within a commitment.

5 Zodiac Signs Most Prone to Infidelity