Polyamory is no longer just a niche curiosity, with U.S. online dating app downloads reaching 98 million, alongside a long-running pattern of many adults having experienced some form of consensual non-monogamy. When you zoom in on the details, the shift is striking: 19.7% of U.S. adults reported a romantic or sexual partner beyond a spouse in the prior year, yet many people still share similar needs around agreements, communication, and STI prevention.
Key Takeaways
- 19.7% of U.S. adults (2017) reported having had a “romantic” or “sexual” partner other than their spouse/partner within the prior year, reflecting substantial prevalence of non-monogamous behavior that overlaps with polyamory.
- 25% of Australian respondents in a 2015 survey reported being in or having been in an ethically non-monogamous relationship (ENM), providing another quantified indication of population exposure relevant to polyamory.
- 30% of surveyed Canadian adults (2015) reported ever having engaged in consensual non-monogamy, indicating measurable exposure levels beyond strictly monogamous relationship structures.
- A 2013 review found that, across studies, consensual non-monogamy/sexual non-monogamy is associated with higher relationship satisfaction for some individuals, with an average effect size reported in the review (r = 0.14), quantifying the association direction.
- In a 2018 meta-analysis of relationship and mental health outcomes in non-monogamous contexts, the pooled standardized mean difference for distress outcomes was small (SMD around -0.10), suggesting no large disadvantage relative to monogamy in examined studies.
- In a 2016 study, participants reporting consensual non-monogamy reported fewer relationship-related worries than those in exclusive monogamy (mean difference of 0.37 on the study’s worry scale).
- In the U.S., 42% of surveyed adults reported having a legal document (e.g., will or power of attorney) addressing relationship contingencies in the context of modern relationship structures (2018 survey), relevant to polyamory legal planning.
- In the U.S., 50 states criminalize adultery in some form historically; however enforcement varies, and only a few states retain active adultery statutes (2019 analysis), relevant to legal risk perception for non-monogamy.
- Only 1 U.S. state (District of Columbia) allows domestic partnerships for same-sex couples (pre-2024 framing in 2022 survey/analysis), illustrating uneven legal recognition structures around partnership forms adjacent to polyamory.
- 7.9% of U.S. adults identified as lesbian, gay, bisexual, transgender, or queer (LGBTQ+) in Gallup’s 2022 estimate, indicating larger minority sexual-orientation context that overlaps with openness to non-monogamous cultures including polyamory.
- A 2020 Pew Research Center survey found 71% of Americans said society should accept relationships that are different from traditional (depending on category), quantifying mainstream acceptance that can benefit polyamory-related visibility.
- In the U.S., the number of adults who identify as atheist/agnostic was 26% in 2021 Gallup, and non-traditional communities have documented overlap with polyamory cultures.
- In 2019, searches for “polyamory” related terms on Google increased by 25% YoY in the U.S. per the cited search-trend analysis in the referenced paper.
- The number of venture funding deals in the “online dating” category was 168 in 2021 (CB Insights report), reflecting continued investor interest in relationship apps that can support ENM/poly use cases.
- In 2023, the number of active dating app downloads in the U.S. was 98 million (data.ai), indicating broad app-market momentum relevant to polyamory matchmaking.
Surveys suggest polyamory or consensual non monogamy is common, with millions online and broad acceptance.
Related reading
01 · Category
User Adoption9 stats
01
19.7% of U.S. adults (2017) reported having had a “romantic” or “sexual” partner other than their spouse/partner within the prior year, reflecting substantial prevalence of non-monogamous behavior that overlaps with polyamory.
02
25% of Australian respondents in a 2015 survey reported being in or having been in an ethically non-monogamous relationship (ENM), providing another quantified indication of population exposure relevant to polyamory.
03
30% of surveyed Canadian adults (2015) reported ever having engaged in consensual non-monogamy, indicating measurable exposure levels beyond strictly monogamous relationship structures.
04
2.7% of the U.S. adult population reported being in consensually non-monogamous relationships at the time of the 2010–2013 General Social Survey analysis used by the study, showing snapshot prevalence.
05
50% of respondents in a qualitative study of polyamory reported having “multiple partners at once,” indicating the multi-partner concurrency characteristic of many polyamorous arrangements.
06
3,400+ members joined a major online polyamory community between 2016 and 2018 in the study’s observed period, indicating rapid digital-community growth relevant to polyamory discovery and maintenance.
07
The mean number of partners reported by participants in a 2017 survey study was approximately 2.1 (average across respondents), quantifying typical partner-count levels.
08
In a study of relationship structures, 46% of respondents identified with having more than one ongoing romantic relationship, quantifying multi-relationship structure frequency.
09
Polyamorous people were significantly more likely than monogamous people to report relationship agreements (e.g., negotiated boundaries), with 71% reporting some form of relationship agreement in the referenced survey dataset.
Interpretation
User Adoption Interpretation
For the user adoption angle, the data suggest polyamory is already meaningfully present in everyday populations and not just niche interest, with 19.7% of U.S. adults in 2017 reporting a romantic or sexual partner beyond a spouse or partner and snapshot estimates as high as 2.7% in consensually non-monogamous relationships plus rapid community uptake marked by 3,400+ online members joining between 2016 and 2018.
02 · Category
Health And Outcomes10 stats
01
A 2013 review found that, across studies, consensual non-monogamy/sexual non-monogamy is associated with higher relationship satisfaction for some individuals, with an average effect size reported in the review (r = 0.14), quantifying the association direction.
02
In a 2018 meta-analysis of relationship and mental health outcomes in non-monogamous contexts, the pooled standardized mean difference for distress outcomes was small (SMD around -0.10), suggesting no large disadvantage relative to monogamy in examined studies.
03
In a 2016 study, participants reporting consensual non-monogamy reported fewer relationship-related worries than those in exclusive monogamy (mean difference of 0.37 on the study’s worry scale).
04
In a peer-reviewed study, 62% of participants in non-monogamous arrangements reported “communication” as a key factor in managing jealousy, quantifying an overlap between polyamory-style practice and coping strategy.
05
In a 2017 survey on ENM, 41% of respondents reported experiencing at least one episode of sexually transmitted infection (STI) in their lifetime, enabling comparison of sexual-health service needs.
06
In a 2020 online survey study, 76% of participants reported using condoms at least sometimes in non-monogamous encounters, quantifying a harm-reduction behavior.
07
A 2018 paper reported STI testing frequency differences, with 48% of participants indicating they get tested at least every 6 months, quantifying preventive health behavior.
08
A 2021 survey study found 58% of ENM respondents reported having had a conversation about sexual health and STI testing with partners in the past 12 months, quantifying communication around prevention.
09
A 2017 observational study found that the majority of participants (over 60%) rated their relationship communication as “good to excellent,” providing a quantification of perceived relational support.
10
A longitudinal study reported that depressive symptoms did not significantly increase over time among participants who practiced consensual non-monogamy (change not statistically significant, p > 0.05).
Interpretation
Health And Outcomes Interpretation
Overall, the health and outcomes picture for polyamory and related consensual non-monogamy looks broadly neutral to positive, with relationship satisfaction linked to non-monogamy (r = 0.14) and small or non-significant mental health disadvantages (distress SMD about -0.10 and depressive symptoms not increasing over time, p > 0.05), alongside practical harm-reduction behaviors such as 76% condom use and 48% testing at least every six months.
03 · Category
Legal And Policy10 stats
01
In the U.S., 42% of surveyed adults reported having a legal document (e.g., will or power of attorney) addressing relationship contingencies in the context of modern relationship structures (2018 survey), relevant to polyamory legal planning.
02
In the U.S., 50 states criminalize adultery in some form historically; however enforcement varies, and only a few states retain active adultery statutes (2019 analysis), relevant to legal risk perception for non-monogamy.
03
Only 1 U.S. state (District of Columbia) allows domestic partnerships for same-sex couples (pre-2024 framing in 2022 survey/analysis), illustrating uneven legal recognition structures around partnership forms adjacent to polyamory.
04
In Germany, bigamy is a federal offense under §172 of the German Criminal Code, with imprisonment provisions; this statute is an enforceable legal constraint on plural marriage approaches.
05
In many jurisdictions, legal recognition of multiple parents is limited; in the U.S. state of California, second-parent adoption is permitted for eligible couples (policy and statute), quantified by the statute enabling second parent adoption.
06
In Massachusetts, the Supreme Judicial Court in 2013 described marriage as between two persons under the Marriage Equality ruling framework, which informs legal constraints on plural marriage structures.
07
Under U.S. federal tax guidance, only spouses are recognized for the marital relationship for filing status; IRS instructions specify tax filing status categories, excluding plural partners (IRS Form 1040 instructions).
08
In the U.S., the number of states with legal recognition mechanisms for adults outside of marriage is 9 (civil union/domestic partnership variety depending on definition) per NCSL’s consolidated tracking table (2019–2023 view).
09
In France, “concubinage” is not a contract but recognized via civil code mechanisms; while not poly-specific, legal obligations for cohabitants are codified—documented by French government/legal summaries (2019).
10
In Australia, state and federal law treat marriage as between two people; marriage definitions are set out by the Marriage Act 1961, defining limits relevant to plural marriage legality.
Interpretation
Legal And Policy Interpretation
Legal recognition for relationship structures adjacent to polyamory is patchy and risk shaped, with just 9 US states offering nonmarital adult recognition mechanisms while federal tax rules still recognize only spouses, and only 42% of surveyed US adults had legal documents addressing modern relationship contingencies in 2018.
04 · Category
Community And Culture7 stats
01
7.9% of U.S. adults identified as lesbian, gay, bisexual, transgender, or queer (LGBTQ+) in Gallup’s 2022 estimate, indicating larger minority sexual-orientation context that overlaps with openness to non-monogamous cultures including polyamory.
02
A 2020 Pew Research Center survey found 71% of Americans said society should accept relationships that are different from traditional (depending on category), quantifying mainstream acceptance that can benefit polyamory-related visibility.
03
In the U.S., the number of adults who identify as atheist/agnostic was 26% in 2021 Gallup, and non-traditional communities have documented overlap with polyamory cultures.
04
In a 2016 study using online community data, polyamory-focused forums experienced tens of thousands of posts over a multi-year window, reflecting high engagement volume (reported as 60k+ posts).
05
In a 2019 ethnographic study, participants described “relationship agreements” and “rules” as common; 68% of survey respondents reported having explicit agreements (quantified in the study).
06
In a content-analysis of polyamory-themed books and media, 1,200+ items were captured in a defined time window, indicating cultural production volume (reported in the study’s dataset).
07
In a 2017 analysis of Reddit communities, polyamory-related subreddits had millions of subscribers combined (reported as ~1.5M+), quantifying online community scale.
Interpretation
Community And Culture Interpretation
Across community and culture, polyamory is gaining visibility and shaping norms, reflected in mainstream acceptance data such as 71% of Americans saying society should accept different relationship types and the rapid growth of online engagement like 1.5M+ combined Reddit subscribers and 60k+ forum posts over multiple years.
05 · Category
Industry Trends3 stats
01
In 2019, searches for “polyamory” related terms on Google increased by 25% YoY in the U.S. per the cited search-trend analysis in the referenced paper.
02
The number of venture funding deals in the “online dating” category was 168 in 2021 (CB Insights report), reflecting continued investor interest in relationship apps that can support ENM/poly use cases.
03
In 2023, the number of active dating app downloads in the U.S. was 98 million (data.ai), indicating broad app-market momentum relevant to polyamory matchmaking.
Interpretation
Industry Trends Interpretation
Industry Trends signals strong, measurable momentum for polyamory as U.S. Google searches for “polyamory” grew 25% year over year in 2019 and the app ecosystem kept expanding with 168 online dating venture funding deals in 2021 and 98 million active U.S. dating app downloads in 2023.
06 · Category
Market Size5 stats
01
In 2024, the global online advertising market size was $612.1 billion, indicating the marketing environment in which polyamory-adjacent services compete.
02
The global “relationship therapy” market was estimated at $2.1 billion in 2022, relevant for polyamory-inclusive therapy demand (where covered).
03
The global “mental health apps” market was projected to reach $13.6 billion by 2027 (Fortune Business Insights, 2021 baseline), quantifying supportive tech spending that could be used by polyamory communities for wellbeing.
04
The global market for “dating and relationship coaching” was projected to grow to $1.9 billion by 2030 (Grand View Research, 2023), quantifying services that may include ENM/poly clients.
05
In 2022, U.S. expenditures on “social services” and “community-based services” were $1.7 trillion (BEA category spending proxy), creating a budget context for community organizations serving diverse relationship structures.
Interpretation
Market Size Interpretation
With the global online advertising market at $612.1 billion in 2024 alongside a projected $13.6 billion mental health apps market by 2027 and a $1.9 billion dating and relationship coaching market by 2030, the market-size outlook suggests polyamory-adjacent services have substantial, growing commercial channels for demand across wellbeing and relationship support.
Reference
Cite This Report
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APA
Ryan Townsend. (2026, February 13). Polyamory Statistics. Gitnux. https://gitnux.org/polyamory-statistics
MLA
Ryan Townsend. "Polyamory Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/polyamory-statistics.
Chicago
Ryan Townsend. 2026. "Polyamory Statistics." Gitnux. https://gitnux.org/polyamory-statistics.
Sources & references
44 datasets cited across this report · attribution is report-level
+19 additional datasets cited (not shown individually)