Rarest Hadrosaur — All 86 Answers Ranked by Rarity

86 answers are accepted for “Name a hadrosaur”. Heilongjiangosaurus is the rarest hadrosaur in this ranking, with 163 monthly Wikipedia views (rarity 1.000, Legendary). Edmontosaurus kuukpikensis is the second-rarest with 226 monthly Wikipedia views, 1.39× the figure for Heilongjiangosaurus. Parasaurolophus is the most common hadrosaur in this ranking, with 207,746 monthly Wikipedia views, 1,275× the figure for the rarest. Combined monthly Wikipedia views across the 86 answers: 1,007,658. Heilongjiangosaurus is under 0.1% of that total. 18 answers are Epic or Legendary: Heilongjiangosaurus (Legendary), Edmontosaurus kuukpikensis (Legendary), Huaxiaosaurus (Legendary), and 15 more.

Quick answer

Monthly English Wikipedia pageviews. Source: Wikidata + Wikipedia pageviews (2026-10).

Ranked answers

86 answers to “Name a hadrosaur”, rarest first. A rarity of 1 is the rarest answer in this prompt.
Rank	Answer	Tier	Rarity	Monthly Wikipedia views
1	Heilongjiangosaurus on Wikipedia	Legendary	1.000	163
2	Edmontosaurus kuukpikensis on Wikipedia	Legendary	0.988	226
3	Huaxiaosaurus on Wikipedia	Legendary	0.976	620
4	Didanodon on Wikipedia	Legendary	0.965	665
5	Ornithotarsus on Wikipedia	Legendary	0.953	681
6	Pteropelyx on Wikipedia	Legendary	0.941	1,125
7	Anatotitan on Wikipedia	Epic	0.929	1,196
8	Koutalisaurus on Wikipedia	Epic	0.918	1,435
9	Sahaliyania on Wikipedia	Epic	0.906	1,543
10	Cionodon on Wikipedia	Epic	0.894	1,589
11	Microhadrosaurus on Wikipedia	Epic	0.882	1,634
12	Willinakaqe on Wikipedia	Epic	0.871	1,700
13	Arstanosaurus on Wikipedia	Epic	0.859	1,802
14	Stephanosaurus on Wikipedia	Epic	0.847	1,882
15	Thespesius on Wikipedia	Epic	0.835	2,090
16	Nanningosaurus on Wikipedia	Epic	0.824	2,293
17	Ornatops on Wikipedia	Epic	0.812	2,491
18	Kazaklambia on Wikipedia	Epic	0.800	2,588
19	Mandschurosaurus on Wikipedia	Rare	0.788	2,627
20	Orthomerus on Wikipedia	Rare	0.776	2,647
21	Lapampasaurus on Wikipedia	Rare	0.765	2,654
22	Laiyangosaurus on Wikipedia	Rare	0.753	2,765
23	Cedrorestes on Wikipedia	Rare	0.741	2,899
24	Plesiohadros on Wikipedia	Rare	0.729	2,974
25	Diclonius on Wikipedia	Rare	0.718	2,978
26	Probrachylophosaurus on Wikipedia	Rare	0.706	3,006
27	Riabininohadros on Wikipedia	Rare	0.694	3,116
28	Tanius on Wikipedia	Rare	0.682	3,272
29	Wulagasaurus on Wikipedia	Rare	0.671	3,371
30	Blasisaurus on Wikipedia	Rare	0.659	3,393
31	Malefica on Wikipedia	Rare	0.647	3,448
32	Anasazisaurus on Wikipedia	Rare	0.635	3,525
33	Rhinorex on Wikipedia	Rare	0.624	3,736
34	Aquilarhinus on Wikipedia	Rare	0.612	3,886
35	Coahuilasaurus on Wikipedia	Rare	0.600	3,955
36	Latirhinus on Wikipedia	Uncommon	0.588	3,976
37	Huallasaurus on Wikipedia	Uncommon	0.576	4,076
38	Eotrachodon on Wikipedia	Uncommon	0.565	4,154
39	Pararhabdodon on Wikipedia	Uncommon	0.553	4,308
40	Angulomastacator on Wikipedia	Uncommon	0.541	4,315
41	Canardia on Wikipedia	Uncommon	0.529	4,355
42	Hypsibema on Wikipedia	Uncommon	0.518	4,539
43	Yamatosaurus on Wikipedia	Uncommon	0.506	4,573
44	Taleta on Wikipedia	Uncommon	0.494	4,719
45	Arenysaurus on Wikipedia	Uncommon	0.482	4,755
46	Kelumapusaura on Wikipedia	Uncommon	0.471	4,821
47	Kerberosaurus on Wikipedia	Uncommon	0.459	4,839
48	Bonapartesaurus on Wikipedia	Uncommon	0.447	5,064
49	Jaxartosaurus on Wikipedia	Uncommon	0.435	5,227
50	Adelolophus on Wikipedia	Uncommon	0.424	5,249
51	Minqaria on Wikipedia	Uncommon	0.412	5,516
52	Plesiolophus on Wikipedia	Uncommon	0.400	5,606
53	Adynomosaurus on Wikipedia	Familiar	0.388	5,695
54	Acristavus on Wikipedia	Familiar	0.376	5,728
55	Velafrons on Wikipedia	Familiar	0.365	6,024
56	Nipponosaurus on Wikipedia	Familiar	0.353	6,412
57	Tlatolophus on Wikipedia	Familiar	0.341	6,428
58	Aralosaurus on Wikipedia	Familiar	0.329	6,503
59	Kamuysaurus on Wikipedia	Familiar	0.318	6,740
60	Ahshislesaurus on Wikipedia	Familiar	0.306	7,100
61	Gongshuilong on Wikipedia	Familiar	0.294	7,163
62	Secernosaurus on Wikipedia	Familiar	0.282	7,793
63	Ajnabia on Wikipedia	Familiar	0.271	7,894
64	Claosaurus on Wikipedia	Familiar	0.259	8,037
65	Prosaurolophus on Wikipedia	Familiar	0.247	9,111
66	Amurosaurus on Wikipedia	Familiar	0.235	9,325
67	Gilmoreosaurus on Wikipedia	Familiar	0.224	9,710
68	Kritosaurus on Wikipedia	Familiar	0.212	10,228
69	Barsboldia on Wikipedia	Common	0.200	10,424
70	Trachodon on Wikipedia	Common	0.188	11,708
71	Gryposaurus on Wikipedia	Common	0.176	12,731
72	Magnapaulia on Wikipedia	Common	0.165	13,510
73	Augustynolophus on Wikipedia	Common	0.153	14,792
74	Tsintaosaurus on Wikipedia	Common	0.141	15,066
75	Hypacrosaurus on Wikipedia	Common	0.129	16,249
76	Brachylophosaurus on Wikipedia	Common	0.118	16,944
77	Charonosaurus on Wikipedia	Common	0.106	17,801
78	Olorotitan on Wikipedia	Common	0.094	18,940
79	Lambeosaurus on Wikipedia	Common	0.082	33,408
80	Corythosaurus on Wikipedia	Common	0.071	35,172
81	Shantungosaurus on Wikipedia	Common	0.059	38,523
82	Hadrosaurus on Wikipedia	Common	0.047	46,439
83	Saurolophus on Wikipedia	Common	0.035	51,954
84	Maiasaura on Wikipedia	Common	0.024	63,723
85	Edmontosaurus on Wikipedia	Common	0.012	102,570
86	Parasaurolophus on Wikipedia	Common	0.000	207,746

FAQ

What is the rarest hadrosaur?

Heilongjiangosaurus is the rarest hadrosaur in this ranking, with 163 monthly Wikipedia views (rarity 1.000, Legendary).

How many hadrosaurs are there?

There are 86 hadrosaurs in this ranking, from Heilongjiangosaurus (rarest) to Parasaurolophus (most common).

What is the most common hadrosaur?

Parasaurolophus is the most common hadrosaur in this ranking, with 207,746 monthly Wikipedia views (Common).

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Sources

Recorded source: Wikidata + Wikipedia pageviews (2026-10). The answer list is compiled from Wikidata (CC0), and the view counts are monthly English Wikipedia pageviews. Rarity is the percentile of the popularity figure inside this prompt: 1 is the rarest and 0 is the most common. Linked names open the English Wikipedia article stored on that answer.