The United States of America swore in 47,819 Nigerians as naturalised citizens from 2019 to 2023, an updated U.S. Naturalisations Annual Flow Report by the Department of Homeland Security shows.
The report, updated in August 2025 and compiled by the Office of Homeland Security Statistics, draws its figures from Form N-400, the application every would-be American citizen submits.
The data is also drawn from the electronic case files used by U.S. Citizenship and Immigration Services to track each application from fingerprinting to the oath ceremony.
According to data obtained, 8,930 Nigerians were naturalised from October 2019 to September 2020, a year marked by COVID-19 shutdowns that paused oath ceremonies for 11 weeks, March 18, 2020, to June 4, 2020
The following year, 10,921 Nigerians obtained citizenship as USCIS cleared its pandemic backlog.
In 2022, 14,438 Nigerians took the oath, an all-time high for the country and a 32 per cent jump from the previous year. That number, however, dropped to 13,530 in 2023.
The four years add up to 47,819 new Nigerian-American citizens, accounting for approximately 1.4 per cent of all 341,884 Africans who naturalised in that period
When the OHSS grouped naturalisations by source countries, Nigeria and the Democratic Republic of the Congo emerged in the top 30 list. 47,819 Nigerians were naturalised within that period, followed by the DRC, which almost doubled in 2022 to about 6,000. Other African source countries include Ethiopia, Ghana and Kenya.
African-born nationals accounted for 11 per cent of all U.S. naturalisations in both 2022 and 2023, the highest share on record; up from an average 9.6 per cent in 2010–2019. Africans who naturalised in 2023 had a median of six years in lawful permanent resident status before taking the oath, the shortest of any world region, alongside Asia.
Overall, naturalisations of Africans increased by 43 per cent between 2020 and 2023, the highest increase among all continents.
Across all regions, Mexico accounted for 437,697 naturalisations over the three years. India followed with 230,164 naturalisations, steadily rising from 48,111 in 2020, 57,043 in 2021, and 65,960 in 2022, respectively, but dropped to 59,050 in 2023.
