Fertility & birth rates in Kiribati and Nauru

Fertility rate in Kiribati vs Nauru chart

According to the latest available data on birth rates, the fertility rate in Kiribati was 3.15 children per woman in 2023, compared to 3.33 in Nauru in 2023. The replacement level is considered to be 2.1 children per woman.

Check Kiribati vs Nauru population clock for a dynamic visualization of the changing population.

The chart below showcases historical changes in the birth rates.

Table

Year	Fertility rate
	Kiribati	Nauru
1960	6.44	5.34
1961	6.48	5.38
1962	6.42	5.42
1963	6.35	5.44
1964	6.29	5.47
1965	6.26	5.48
1966	6.23	5.41
1967	6.11	5.29
1968	5.98	5.14
1969	5.85	4.94
1970	5.71	4.74
1971	5.55	4.54
1972	5.37	4.36
1973	5.2	4.19
1974	5.09	4.07
1975	5.02	3.97
1976	4.96	3.9
1977	4.96	3.86
1978	4.97	3.84
1979	4.97	3.85
1980	4.96	3.88
1981	4.96	3.94
1982	4.95	3.99
1983	4.91	4.06
1984	4.91	4.11
1985	4.91	4.14
1986	4.87	4.15
1987	4.81	4.14
1988	4.73	4.11
1989	4.69	4.07
1990	4.67	4.02
1991	4.64	3.99
1992	4.57	3.95
1993	4.49	3.89
1994	4.44	3.84
1995	4.42	3.81
1996	4.43	3.78
1997	4.37	3.74
1998	4.29	3.68
1999	4.18	3.64
2000	4.07	3.54
2001	3.96	3.46
2002	3.81	3.4
2003	3.7	3.39
2004	3.73	3.38
2005	3.76	3.38
2006	3.82	3.4
2007	3.87	3.5
2008	3.9	3.67
2009	3.91	3.85
2010	3.9	4.02
2011	3.88	4.12
2012	3.77	4.12
2013	3.64	4.1
2014	3.52	4.09
2015	3.44	4.08
2016	3.38	4.03
2017	3.34	3.88
2018	3.32	3.68
2019	3.29	3.53
2020	3.25	3.47
2021	3.22	3.43
2022	3.18	3.38
2023	3.15	3.33
2024	3.12	3.29
2025	3.09	3.25
2026	3.06	3.2
2027	3.03	3.16
2028	3	3.12
2029	2.97	3.09
2030	2.94	3.05
2031	2.92	3.01
2032	2.89	2.98
2033	2.86	2.95
2034	2.84	2.92
2035	2.81	2.89
2036	2.79	2.86
2037	2.77	2.83
2038	2.74	2.8
2039	2.72	2.77
2040	2.69	2.75
2041	2.67	2.72
2042	2.64	2.7
2043	2.62	2.67
2044	2.6	2.65
2045	2.58	2.63
2046	2.56	2.61
2047	2.54	2.58
2048	2.52	2.56
2049	2.5	2.55
2050	2.48	2.53

Children 0-14 years as share of population

Table

Year	Share of people 0-14 years old
	Kiribati	Nauru
1960	43.2%	34.8%
1961	43.5%	35.2%
1962	43.8%	35.7%
1963	44%	36.5%
1964	44%	37.5%
1965	43.9%	38.6%
1966	44.1%	39.4%
1967	44.5%	39.5%
1968	44.9%	41.3%
1969	45%	43.4%
1970	44.9%	42.9%
1971	44.8%	41.3%
1972	44.8%	39.7%
1973	44.6%	38.1%
1974	44.2%	36.4%
1975	43.7%	34.9%
1976	43.2%	33.4%
1977	42.8%	31.9%
1978	42.3%	30.9%
1979	41.8%	30.6%
1980	41.1%	30.9%
1981	40.5%	31.9%
1982	39.9%	33.2%
1983	39.5%	34.6%
1984	39.2%	35.7%
1985	39.2%	36.5%
1986	39.2%	37.5%
1987	39.4%	38.3%
1988	39.7%	39.2%
1989	39.9%	40.2%
1990	40.2%	41.2%
1991	40.5%	42.1%
1992	40.8%	42.5%
1993	41%	42.5%
1994	41.2%	42.1%
1995	41.2%	41.7%
1996	41.1%	41.1%
1997	41%	40.5%
1998	40.8%	39.9%
1999	40.5%	39.4%
2000	40.1%	38.9%
2001	39.8%	38.5%
2002	39.3%	38.2%
2003	38.9%	37.7%
2004	38.4%	37.1%
2005	38%	36.6%
2006	37.6%	36.1%
2007	37.3%	35.7%
2008	37%	35.6%
2009	36.8%	35.8%
2010	36.6%	36.3%
2011	36.4%	37.1%
2012	36.1%	37.7%
2013	35.7%	38%
2014	35.4%	38.2%
2015	35.2%	38.2%
2016	35%	38.2%
2017	35%	38%
2018	35.1%	37.6%
2019	35.1%	37.6%
2020	35.2%	38%
2021	35.2%	38.3%
2022	35.1%	38.3%
2023	34.9%	38.2%
2024	34.7%	37.8%
2025	34.4%	37.1%
2026	34%	36.4%
2027	33.5%	35.7%
2028	33.1%	35%
2029	32.7%	34.3%
2030	32.4%	33.7%
2031	32%	33.1%
2032	31.7%	32.7%
2033	31.3%	32.4%
2034	31%	32.1%
2035	30.6%	31.9%
2036	30.3%	31.6%
2037	30%	31.3%
2038	29.7%	31.1%
2039	29.4%	31%
2040	29.2%	31%
2041	29%	30.9%
2042	28.8%	30.9%
2043	28.6%	30.9%
2044	28.4%	30.9%
2045	28.3%	30.8%
2046	28.1%	30.7%
2047	27.9%	30.6%
2048	27.8%	30.4%
2049	27.6%	30.2%
2050	27.4%	30%

Children aged 0-14 make up 34.7% of the population in Kiribati and 37.8% in Nauru in 2024, compared to 40.2% and 41.2% respectively in 1990.

Demographics of Kiribati and Nauru compared.

Natural population change in Kiribati vs Nauru by year

For the past 10 years, the annual natural population change (excluding migration) has been +2.05% in Kiribati and +2.28% in Nauru. The chart below illustrates the comparison of the absolute yearly changes resulting from births and deaths.

Table

Year	Population change due to births and deaths
	Kiribati	Nauru
1960	1,141	72
1961	1,199	70
1962	1,233	75
1963	1,273	88
1964	1,318	100
1965	1,376	113
1966	1,437	123
1967	1,417	117
1968	1,393	116
1969	1,367	71
1970	1,388	49
1971	1,406	50
1972	1,406	53
1973	1,409	57
1974	1,430	63
1975	1,423	70
1976	1,425	79
1977	1,426	89
1978	1,480	111
1979	1,509	130
1980	1,571	145
1981	1,635	157
1982	1,697	162
1983	1,748	163
1984	1,813	166
1985	1,881	171
1986	1,933	178
1987	1,982	186
1988	2,022	195
1989	2,073	204
1990	2,127	214
1991	2,176	225
1992	2,173	237
1993	2,161	235
1994	2,168	229
1995	2,183	225
1996	2,217	221
1997	2,220	218
1998	2,210	214
1999	2,186	212
2000	2,153	207
2001	2,121	203
2002	2,074	200
2003	2,045	201
2004	2,118	202
2005	2,188	204
2006	2,285	209
2007	2,393	222
2008	2,493	240
2009	2,573	261
2010	2,644	281
2011	2,709	291
2012	2,678	292
2013	2,629	291
2014	2,577	290
2015	2,555	291
2016	2,546	289
2017	2,549	279
2018	2,561	265
2019	2,560	255
2020	2,497	246
2021	2,408	236
2022	2,522	226
2023	2,487	213

Maternal mortality chart: Kiribati vs Nauru

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 80 deaths per 100,000 live births in Kiribati, compared to 273 deaths in Nauru.

Table

Year	Maternal mortality per 100K births
	Kiribati	Nauru
1985	246	191
1986	232	209
1987	231	206
1988	220	202
1989	212	198
1990	199	195
1991	188	216
1992	175	217
1993	162	219
1994	150	220
1995	148	219
1996	141	218
1997	132	218
1998	126	257
1999	121	277
2000	119	278
2001	113	299
2002	109	321
2003	105	323
2004	106	324
2005	104	328
2006	102	304
2007	101	303
2008	100	302
2009	99	300
2010	102	297
2011	98	260
2012	98	255
2013	93	247
2014	91	240
2015	90	253
2016	88	248
2017	90	259
2018	87	269
2019	89	267
2020	89	309
2021	122	266
2022	86	317
2023	80	273

Under-five mortality rates

The chance that a newborn baby will die before reaching age five is 5.51% in Kiribati and 0.89% in Nauru. Below is the historical data on under-five mortality rates.

Table

Year	Mortality rate before reaching 5 years of age, per 1,000 live births
	Kiribati	Nauru
1960	19.9%	-
1961	19.5%	-
1962	18.9%	-
1963	18.3%	-
1964	17.7%	-
1965	17.1%	-
1966	16.4%	-
1967	15.8%	-
1968	15.2%	-
1969	14.6%	-
1970	14.1%	-
1971	13.7%	-
1972	13.3%	-
1973	13%	-
1974	12.7%	-
1975	12.5%	-
1976	12.4%	-
1977	12.3%	-
1978	12.2%	-
1979	12%	-
1980	11.9%	-
1981	11.7%	-
1982	11.6%	-
1983	11.4%	-
1984	11.1%	-
1985	10.9%	8.62%
1986	10.6%	8.2%
1987	10.2%	7.81%
1988	9.87%	7.43%
1989	9.5%	7.08%
1990	9.13%	6.74%
1991	8.77%	6.41%
1992	8.44%	6.09%
1993	8.13%	5.78%
1994	7.87%	5.49%
1995	7.64%	5.22%
1996	7.42%	4.97%
1997	7.22%	4.74%
1998	7.02%	4.52%
1999	6.83%	4.32%
2000	6.64%	4.13%
2001	6.46%	3.96%
2002	6.31%	3.81%
2003	6.2%	3.66%
2004	6.13%	3.53%
2005	6.07%	3.41%
2006	6.03%	3.29%
2007	5.99%	3.15%
2008	5.93%	3%
2009	5.87%	2.84%
2010	5.82%	2.66%
2011	5.79%	2.48%
2012	5.78%	2.29%
2013	5.8%	2.11%
2014	5.84%	1.93%
2015	5.89%	1.76%
2016	5.95%	1.61%
2017	5.99%	1.47%
2018	5.98%	1.34%
2019	5.93%	1.22%
2020	5.86%	1.11%
2021	5.76%	1.02%
2022	5.65%	0.95%
2023	5.51%	0.89%