About
Esperanto statistics: facts and figures with sources
Every number below comes with a date, a source and a link, and disputed figures are given as ranges.
Esperanto has an estimated 60,000 to 2 million speakers, depending on the definition, and about 1,000–2,000 native speakers. The Universal Esperanto Association had 4,700 individual members in 130 countries in 2023. The Esperanto Wikipedia had 389,591 articles on 8 October 2026. 111 World Esperanto Congresses have been numbered since 1905, and 108 took place. The grammar has 16 rules and a 28-letter alphabet.
Figures were checked on 8 October 2026 unless a row gives another date. Live counts (Wikipedia, Tatoeba, Pasporta Servo) change daily. "Our count" marks a figure we calculated from published data.
How many people speak Esperanto?
| Estimate | Year | What it counts | Source |
|---|---|---|---|
| 1,000–2,000 | 1996–2022 | Native speakers: about 1,000 (Lindstedt 1996, 2006); about 2,000 children in about 1,000 families (2004); 1,000 (Ethnologue 2022) | Lindstedt 2006; Corsetti, Pinto & Tolomeo 2004 |
| About 10,000 | 1996 | Fluent speakers, in Lindstedt's scale of 1,000 native, 10,000 fluent, 100,000 active, 1 million passive | Wikipedia, Esperanto |
| About 20,000 | 2003 | Members of Esperanto organisations; Ziko van Dijk doubted that fifty times as many unorganised speakers exist | Wikipedia, Esperanto |
| About 63,000 (30,000–180,000) | 2017 | People who would say "yes" in a census, estimated by Svend Vendelbo Nielsen from census, membership and website data | Libera Folio, 13 Feb 2017 |
| About 100,000 (30,000–300,000) | 2006 | People who can really speak it (Jouko Lindstedt) | Lindstedt 2006 |
| 1–2 million | 1958–1989 | People with "professional" proficiency, from Sidney Culbert's sample surveys; rounded to 2 million from 1988 | Culbert, letter of 24 Oct 1989 |
| About 1.92 million | 2015 | Esperanto users among internet users, scaled up by Amri Wandel from 320,000 Facebook users at the end of 2014 | Wandel 2015 |
The lowest and highest figures differ about thirty-fold, mostly because they define "speaker" differently. Methods and criticism are on how many people speak Esperanto; families and linguistic findings are on native speakers.
How big is the organised movement?
| Indicator | Figure | Date | Source |
|---|---|---|---|
| UEA individual members | 4,700 in 130 countries and territories (4,552 in 2022) | 2023 | UEA, Estrara Raporto 2023 |
| UEA individual members, earlier | 5,288 (2010); 5,501 (2015); 4,162 (2019) | 2010–2019 | UEA; Libera Folio, 31 Mar 2020 |
| UEA individual plus affiliated members | 12,829 | 2023 | UEA, Estrara Raporto 2023 |
| Individual members by country | France 401, Germany 394, Brazil 279, USA 248, Japan 209 | 2023 | UEA, Estrara Raporto 2023 |
| National associations in UEA | 70 (Vikipedio says about 60) | undated page | UEA; Vikipedio |
| Hungarian census: people who know Esperanto | 2,083 (1990); 4,575 (2001); 8,397 (2011) | 1990–2011 | Wikipedia, Languages of the EU; Libera Folio, 2017 |
| Pasporta Servo hosts | More than 2,400 in 121 countries and 1,801 cities | 8 Oct 2026 | pasportaservo.org |
Membership is a floor, not a total: many speakers join only a national association or none. Hungary's rise reflects state language exams that accepted Esperanto. See where Esperanto is spoken and the organisations.
Esperanto online
| Indicator | Figure | Date | Source |
|---|---|---|---|
| Esperanto Wikipedia (Vikipedio) | 389,591 articles; 38th of about 350 language editions (our count); 359 active registered users in the last 30 days | 8 Oct 2026 | Wikimedia statistics; List of Wikipedias |
| Other constructed-language Wikipedias | Ido 64,824; Volapük 56,673; Interlingua 30,299; Interlingue 13,802 | 11 Oct 2026 | Wikimedia statistics: Ido, Volapük, Interlingua, Interlingue |
| Vikipedio readers | About 2.05 million human page views a month (median of 12 months) | Oct 2025 – Sep 2026 | Wikimedia pageviews API |
| Tatoeba sentences | 822,674, fourth of 431 languages after English (2,047,005), Russian (1,229,145) and Italian (988,711) | 8 Oct 2026 | Tatoeba statistics |
| Tatoeba audio recordings | 82,553, third after English (850,275) and Spanish (119,429) | 8 Oct 2026 | Tatoeba statistics |
| lernu.net | Launched 21 Dec 2002; 100,000 registered users on 29 May 2011; interface menu in 40 languages | 2002–2026 | Vikipedio, Lernu!; lernu.net |
| Duolingo | Course for English speakers opened 28 May 2015; 2.8 million people had started its Esperanto courses (1.6 million via English, 871,000 Spanish, 376,000 Portuguese) | Mar 2020 | Vikipedio, Duolingo; Libera Folio, 31 Mar 2020 |
| Duolingo English course | 69 units, 1,318 lessons, level A1 | 8 Oct 2026 (course updated Jul 2025) | Duolingo Data (unofficial tracker) |
| Machine translation | Google Translate added Esperanto on 22 Feb 2012 (its 64th language); Yandex Translate on 25 Jul 2016 | 2012, 2016 | Wikipedia, Esperanto |
Course starters are learners, not speakers, and we found no newer verified Duolingo total; see after Duolingo.
World Esperanto Congresses in numbers
| Fact | Figure | Source |
|---|---|---|
| Congresses numbered, 1905–2026 | 111 (Graz 2026 was the 111th); 108 took place | UEA list of congresses |
| Cancelled | 3: Paris 1914 (war; 3,739 had registered), Montreal 2020 and Belfast 2021 (COVID-19; Montreal was held in 2022 instead, and online Virtual Congresses had about 2,000 and 1,850 registrants) | UEA list; 2020, 2021 |
| First | Boulogne-sur-Mer, August 1905: 688 participants | UEA list |
| Largest | Warsaw 1987: 5,946; Nuremberg 1923: 4,963 | UEA list |
| Smallest | San Francisco 1915: 163 | UEA list |
| 3,000 participants or more | 10 congresses, 1923–1998; the last was Montpellier 1998 (3,133) | Our count from the UEA list |
| Typical size | Median 1,634 and mean 1,774 across the 108 held; mean 1,135 for the 9 held since 2016 | Our calculation from the UEA list |
| Latest | Arusha 2024: 854 (first in Africa); Brno 2025: 1,132; Graz 2026: 1,138 | UEA list |
| Next | Melbourne, 3–10 July 2027 (112th); Kaunas 2028 (113th) | UEA list; Kaunas |
UEA's annual report counts 1,323 registrants from 70 countries for Turin 2023, while its list says 1,318. The full table is on World Esperanto Congress.
The language in numbers
| Element | Number | Source |
|---|---|---|
| Letters | 28 (5 vowels, 23 consonants), one sound each | Fundamento, grammar |
| Grammar rules | 16, first printed in the Unua Libro (1887), binding since the Fundamento (1905) | Fundamento, grammar |
| Grammatical endings | 11 | Akademia Vortaro |
| Correlatives | 45 (5 beginnings × 9 endings) | PMEG |
| Official prefixes | 10 (nine from the Fundamento; mis- since 1929) | PMEG |
| Official suffixes | 31 (28 from the Fundamento; -aĉ- 1909, -ism- 1919, -end- 1953), plus 6 participle suffixes | PMEG |
| Fundamental elements | 2,768 | Akademia Vortaro |
| Official elements to the 9th Addition (2007) | 4,953 (2,768 Fundamental and 2,185 official) | Akademia Vortaro |
| Official Additions | 10, from 1909 (805 elements) to 2023 (420 roots) | Akademio, 10th Addition |
| Elements including the 10th Addition | About 5,373 (4,953 + 420; our sum) | Akademio, 10th Addition |
| Unua Libro, 26 July 1887 | 16 rules, 917 roots, 42 pages | Korĵenkov |
Our list of official roots counts in another unit – one root per entry marked as official in the ReVo dictionary – and has 5,328, so it differs slightly from the Academy's elements. The official list is a core, not the whole vocabulary, because most words are built from roots and affixes. See the grammar cheat sheet and the Academy.
Organisations in numbers
| Organisation | Founded | Figure | Source |
|---|---|---|---|
| Universal Esperanto Association (UEA) | 28 April 1908, Geneva; Rotterdam since 1955 | 4,700 individual members (2023) | Vikipedio, UEA; Wikipedia, UEA |
| World Esperanto Youth Organisation (TEJO) | 14 August 1938, Groet | Pasporta Servo founded 1974 | Wikipedia, TEJO |
| International League of Esperanto Teachers (ILEI) | 12 August 1949, Bournemouth | Present in about 70 countries (2019) | Vikipedio, ILEI |
| SAT | August 1921, Prague | Over 6,500 members in 1929–30 | Wikipedia, SAT |
| Academy of Esperanto | 1905 as the Language Committee; present form 1948 | 43 members and 9 correspondents (June 2026) | Akademio, members |
How many books exist in Esperanto?
No reliable count exists. The Department of Planned Languages of the Austrian National Library, the largest specialist library for interlinguistics, holds about 45,000 printed volumes on about 500 planned languages, Esperanto among them (archived 18 June 2025), so it is a holding, not a title count. Published title estimates range widely; see Esperanto literature.
Key dates
| Date | Event | Source |
|---|---|---|
| 15 December 1859 | Zamenhof born in Białystok (3 December in the Julian calendar); kept as Zamenhof Day and Esperanto Book Day | Zamenhof.info |
| 17 December 1878 | Celebration of the finished first draft, Lingwe uniwersala | Zamenhof.info |
| 26 July 1887 | Unua Libro published in Warsaw (14 July Julian); kept as Esperanto Day | Korĵenkov |
| 1905 | Fundamento (foreword dated July 1905); first World Congress in August; Declaration of Boulogne 9 August | Akademio; Zamenhof.info |
| 28 April 1908 | UEA founded | Vikipedio, UEA |
| 10 December 1954 | UNESCO resolution in Montevideo | ILEI, UNESCO resolutions |
| 28 May 2015 | Duolingo course opens | Vikipedio, Duolingo |
| 24 September 2023 | 10th Official Addition approved | Akademio, 10th Addition |
Two dates repeat every year: 26 July is Esperanto Day and 15 December is Zamenhof Day. For the story behind them, see the history of Esperanto.
Common questions
How many people speak Esperanto?
Estimates run from about 60,000 (Nielsen, 2017: 63,000, margin 30,000–180,000) to about 2 million (Culbert, rounded in 1988; Wandel, 2015). No census counts Esperanto worldwide, so the answer depends on how "speaker" is defined.
How many native speakers of Esperanto are there?
About 1,000–2,000. Lindstedt gave 1,000 (2006), Corsetti, Pinto and Tolomeo cited about 2,000 children in about 1,000 families (2004), and Ethnologue lists 1,000 (2022).
How many articles does the Esperanto Wikipedia have?
389,591 on 8 October 2026. That is 38th among about 350 language editions and the largest Wikipedia in a constructed language.
How many World Esperanto Congresses have there been?
111 have been numbered up to Graz 2026, and 108 took place. The record is 5,946 participants in Warsaw in 1987. The 112th is planned for Melbourne on 3–10 July 2027.
How many official words does Esperanto have?
The Academy counts 4,953 official elements up to 2007, of which 2,768 are Fundamental. The 10th Addition of 2023 added 420 roots, so about 5,373 in all by our sum. Many more words are built from these roots.
Sources
- Akademio de Esperanto: Akademia Vortaro statistics, Fundamento, Fundamento grammar in English, 10th Official Addition, members and correspondents (June 2026)
- Universal Esperanto Association: Estrara Raporto 2023, structure of UEA, list of World Congresses; Vikipedio, Membronombroj de UEA
- Libera Folio: "Nova takso: 60.000 parolas Esperanton" (13 February 2017), "Kie estas la Duolinganoj?" (31 March 2020)
- Jouko Lindstedt, "Native Esperanto as a test case for natural language", SKY Journal of Linguistics 19, 2006; Corsetti, Pinto & Tolomeo, "Regularizing the regular", 2004
- Sidney Culbert, letter on his methods, 1989; Amri Wandel, "How many people speak Esperanto?", 2015
- Wikimedia: Esperanto Wikipedia statistics (API, 8 October 2026), List of Wikipedias, pageviews API
- Tatoeba statistics, lernu.net, Duolingo Data, Pasporta Servo
- Wikipedia: Esperanto, Languages of the European Union, Universal Esperanto Association, TEJO, ILEI, SAT; Vikipedio, UEA, Lernu!, Duolingo
- PMEG: Tabelvortoj, Prefiksoj, Sufiksoj
- A. Korĵenkov, Zamenhof: The Life, Works and Ideas of the Author of Esperanto; Zamenhof.info chronological biography
- Austrian National Library, Department of Planned Languages (archived 18 June 2025); Kaunas city, 113th World Esperanto Congress; ILEI, UNESCO resolutions 1954–1985
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