Nationality	People	Share
Russians	406,061	54.09%
Mordvins	290,750	38.73%
Tatars	39,855	5.31%
Tajiks	1,544	0.21%
Ukrainians	1,414	0.19%
Armenians	1,356	0.18%
Uzbeks	1,038	0.14%
Azerbaijanis	627	0.08%
Turkmens	570	0.08%
Chuvash people	446	0.06%
Arabs	421	0.06%
Indians	393	0.05%
Belarusians	309	0.04%
Georgians	233	0.03%
Moldovans	192	0.03%
Romani people	184	0.02%
Germans	120	0.02%
Kyrgyz people	118	0.02%
Kazakhs	94	0.01%
Mari people	94	0.01%
Jewish people	93	0.01%
Bashkir people	82	0.01%
Chechens	47	less than 0.01%
Lezgins	45	less than 0.01%
Udmurts	39	less than 0.01%
Koreans	37	less than 0.01%
Poles	37	less than 0.01%
Turkish people	37	less than 0.01%
Ossetians	35	less than 0.01%
Greeks	32	less than 0.01%
Yazidis	30	less than 0.01%
Dargins	27	less than 0.01%
Avars	25	less than 0.01%
Persians	23	less than 0.01%
Afghans	22	less than 0.01%
Lithuanians	21	less than 0.01%
Kalmyks	20	less than 0.01%
Chinese people	20	less than 0.01%
Latvians	19	less than 0.01%
Ingush people	17	less than 0.01%
Komi people	14	less than 0.01%
Kumyk people	13	less than 0.01%
Buryats	12	less than 0.01%
Abkhazians	11	less than 0.01%
Serbs	11	less than 0.01%
Vietnamese people	9	less than 0.01%
Tabasaran people	9	less than 0.01%
Estonians	9	less than 0.01%
Bulgarians	8	less than 0.01%
Nogais	8	less than 0.01%
Gagauz	7	less than 0.01%
Lak people	7	less than 0.01%
Kabarday	6	less than 0.01%
Karachays	6	less than 0.01%
Karelians	6	less than 0.01%
Komi-Permyaks	6	less than 0.01%
Crimean Tatars	6	less than 0.01%
Yakuts	6	less than 0.01%
Adyghe people	5	less than 0.01%
Americans	5	less than 0.01%
Balkars	5	less than 0.01%
Kurds	5	less than 0.01%
Tuvans	4	less than 0.01%
Finns	4	less than 0.01%
Hungarians	3	less than 0.01%
Spaniards	3	less than 0.01%
Nenets	3	less than 0.01%
Pakistanis	3	less than 0.01%
Romanians	3	less than 0.01%
Khakass people	3	less than 0.01%
Circassians	3	less than 0.01%
Besermyan	2	less than 0.01%
Kamchadals	2	less than 0.01%
Uyghurs	2	less than 0.01%
French	2	less than 0.01%
Chuvans	2	less than 0.01%
Evenki people	2	less than 0.01%
Aleuts	1	less than 0.01%
Assyrians	1	less than 0.01%
British	1	less than 0.01%
Izhorians	1	less than 0.01%
Italians	1	less than 0.01%
Cubans	1	less than 0.01%
Rusyns	1	less than 0.01%
Rutulians	1	less than 0.01%
Sámi people	1	less than 0.01%
Slovenes	1	less than 0.01%
Tat people	1	less than 0.01%
Czechs	1	less than 0.01%
Chukchis	1	less than 0.01%

Share of those in the region who stated a nationality. Table sheet: "Республика Мордовия".

Rosstat. National composition of the population of the Russian Federation. Results of the 2020 All-Russian Population Census (reference date 1 October 2021), vol. 5, table 1. Tom5_tab1_VPN-2020.xlsx (archived copy)