Fertility & birth rates in Mongolia and Sierra Leone

Fertility rate in Mongolia vs Sierra Leone by year

Chart Table

Mongolia

Sierra Leone

1x

Year	Fertility rate
	Mongolia	Sierra Leone
2023	2.7	3.79
2022	2.7	3.88
2021	2.8	3.98
2020	2.9	4.08
2019	3	4.19
2018	2.9	4.29
2017	2.8	4.39
2016	3	4.47
2015	3	4.55
2014	3.1	4.7
2013	3	4.87
2012	2.7	5.06
2011	2.6	5.21
2010	2.4	5.33
2009	2.8	5.45
2008	2.6	5.56
2007	2.3	5.64
2006	2.1	5.74
2005	2	5.81
2004	2	5.92
2003	2	6.09
2002	2.1	6.23
2001	2.2	6.31
2000	2.2	6.36
1999	2.3	6.42
1998	2.3	6.5
1997	2.4	6.53
1996	2.5	6.55
1995	2.77	6.56
1994	2.7	6.56
1993	2.5	6.57
1992	3.5	6.56
1991	4	6.55
1990	4.5	6.57
1989	4.42	6.57
1988	4.65	6.59
1987	4.83	6.61
1986	5.03	6.6
1985	5.26	6.59
1984	5.45	6.59
1983	5.63	6.57
1982	5.8	6.56
1981	5.98	6.55
1980	6.21	6.56
1979	6.42	6.58
1978	6.62	6.59
1977	6.79	6.57
1976	6.93	6.55
1975	7.07	6.55
1974	7.17	6.53
1973	7.24	6.47
1972	7.28	6.45
1971	7.3	6.43
1970	7.31	6.41
1969	7.34	6.39
1968	7.37	6.39
1967	7.39	6.38
1966	7.41	6.35
1965	7.38	6.31
1964	7.33	6.29
1963	7.24	6.26
1962	7.1	6.22
1961	6.96	6.21
1960	6.82	6.18

According to the latest available data on birth rates, the fertility rate in Mongolia was 2.7 children per woman in 2023, compared to 3.79 in Sierra Leone in 2023. The replacement level is considered to be 2.1 children per woman.

Check Mongolia vs Sierra Leone population clock for a dynamic visualization of the changing population.

Natural population change by year

Chart Table

Mongolia

Sierra Leone

1x

Year	Natural population change
	Mongolia	Sierra Leone
2023	46,995	188,788
2022	47,730	186,625
2021	52,109	183,326
2020	60,888	181,015
2019	61,433	181,068
2018	60,635	178,772
2017	57,940	173,259
2016	62,086	168,784
2015	64,473	162,275
2014	66,078	160,137
2013	62,618	161,265
2012	55,942	160,915
2011	50,711	158,858
2010	44,914	155,338
2009	48,876	152,669
2008	45,843	149,855
2007	39,636	145,740
2006	33,609	144,127
2005	29,290	137,234
2004	28,418	132,661
2003	28,827	130,312
2002	30,439	126,429
2001	32,052	116,647
2000	32,753	110,754
1999	32,283	102,295
1998	31,757	103,906
1997	32,403	105,433
1996	33,741	104,140
1995	34,473	100,885
1994	34,711	101,486
1993	36,924	103,317
1992	42,437	103,251
1991	47,884	105,477
1990	49,443	100,778
1989	51,420	98,298
1988	51,588	96,344
1987	51,140	94,235
1986	50,329	90,902
1985	49,944	88,869
1984	48,562	87,072
1983	46,919	84,628
1982	45,179	82,457
1981	43,588	80,111
1980	42,343	77,932
1979	41,568	75,992
1978	40,276	74,130
1977	38,995	71,663
1976	37,670	69,506
1975	36,490	67,560
1974	35,297	65,357
1973	33,993	62,443
1972	32,727	60,279
1971	31,536	58,484
1970	30,558	56,513
1969	29,781	54,768
1968	29,017	53,126
1967	28,178	51,734
1966	27,338	49,486
1965	26,364	47,223
1964	25,317	45,487
1963	24,142	43,569
1962	22,960	41,603
1961	21,873	40,022
1960	20,726	38,192

The chart above illustrates the comparison of the absolute yearly changes in population resulting from births and deaths.

Excluding migration, the natural population change due to births and deaths from 2022 to 2023 was +1.35% in Mongolia and +2.23% in Sierra Leone.

For the past 10 years, the annual natural population change has been +1.81% in Mongolia and +2.31% in Sierra Leone.

Birth rate in Mongolia vs Sierra Leone by year

Chart Table

Mongolia

Sierra Leone

Annual births per 1,000 people

1x

Year	Annual births per 1,000 people
	Mongolia	Sierra Leone
2023	19	30.6
2022	19.5	31.1
2021	21.6	31.6
2020	23.4	32.2
2019	24.4	32.8
2018	24.5	33.3
2017	23.9	33.8
2016	25.9	34.2
2015	27.1	34.7
2014	28	35.6
2013	27.5	36.6
2012	26	37.8
2011	25.1	38.5
2010	23.1	39.1
2009	24.8	39.9
2008	23.9	40.6
2007	21.9	41.1
2006	20	41.8
2005	18.6	42
2004	18.4	42.5
2003	18.6	43.5
2002	19.4	44.3
2001	20.3	44
2000	20.8	45
1999	21.1	46.1
1998	21.4	46.3
1997	22.2	46.3
1996	23.3	46.5
1995	24	46.8
1994	24.5	46.8
1993	25.8	46.9
1992	28.8	47
1991	31.9	47.5
1990	34.1	45.5
1989	35.3	46.3
1988	36.4	46.4
1987	37.2	46.6
1986	37.7	46.6
1985	38.5	46.7
1984	38.7	46.8
1983	38.6	46.7
1982	38.5	46.8
1981	38.4	46.8
1980	38.4	46.8
1979	38.7	47
1978	38.9	47.2
1977	39	47.1
1976	39.1	47.2
1975	39.3	47.3
1974	39.5	47.4
1973	39.6	47.2
1972	39.8	47.2
1971	40	47.3
1970	40.4	47.4
1969	40.9	47.5
1968	41.6	47.7
1967	42.3	47.9
1966	43.1	48
1965	43.6	48
1964	44	48.2
1963	44.2	48.2
1962	44.1	48.1
1961	44.2	48.1
1960	44.1	48

The latest reported birth rate per 1,000 people in 2023 was 19 in Mongolia and 30.6 in Sierra Leone, compared with 44.1 and 48, respectively, in 1960.

Children 0-14 years as share of population

Chart Table

Mongolia

Factual

UN forecast

Sierra Leone

Factual

UN forecast

1x

Year	Young
	Mongolia	Sierra Leone
2100	16.3%	19%
2099	16.4%	19%
2098	16.4%	19.1%
2097	16.5%	19.2%
2096	16.6%	19.3%
2095	16.7%	19.5%
2094	16.8%	19.6%
2093	16.9%	19.7%
2092	17%	19.8%
2091	17.2%	19.9%
2090	17.3%	20%
2089	17.4%	20.1%
2088	17.6%	20.3%
2087	17.7%	20.4%
2086	17.9%	20.5%
2085	18%	20.7%
2084	18.1%	20.8%
2083	18.2%	20.9%
2082	18.3%	21.1%
2081	18.4%	21.2%
2080	18.5%	21.4%
2079	18.6%	21.6%
2078	18.6%	21.7%
2077	18.7%	21.9%
2076	18.7%	22.1%
2075	18.7%	22.2%
2074	18.7%	22.4%
2073	18.8%	22.6%
2072	18.8%	22.8%
2071	18.9%	23%
2070	18.9%	23.2%
2069	19%	23.4%
2068	19.1%	23.6%
2067	19.3%	23.8%
2066	19.4%	24%
2065	19.6%	24.3%
2064	19.8%	24.5%
2063	20.1%	24.7%
2062	20.4%	25%
2061	20.7%	25.2%
2060	21%	25.5%
2059	21.3%	25.7%
2058	21.6%	26%
2057	21.9%	26.3%
2056	22.2%	26.6%
2055	22.5%	26.9%
2054	22.7%	27.1%
2053	23%	27.4%
2052	23.1%	27.7%
2051	23.3%	28.1%
2050	23.3%	28.4%
2049	23.4%	28.7%
2048	23.4%	29%
2047	23.3%	29.3%
2046	23.3%	29.7%
2045	23.2%	30%
2044	23.1%	30.3%
2043	23%	30.7%
2042	22.9%	31.1%
2041	22.8%	31.4%
2040	22.8%	31.8%
2039	22.9%	32.2%
2038	23%	32.6%
2037	23.3%	33%
2036	23.6%	33.4%
2035	24%	33.8%
2034	24.6%	34.2%
2033	25.2%	34.6%
2032	25.9%	35%
2031	26.8%	35.4%
2030	27.8%	35.7%
2029	28.8%	36.1%
2028	29.7%	36.5%
2027	30.5%	37%
2026	31.2%	37.4%
2025	31.9%	37.9%
2024	32.2%	38.1%
2023	32.6%	38.5%
2022	32.9%	39%
2021	32.9%	39.4%
2020	32.8%	39.8%
2019	32.3%	40.2%
2018	31.6%	40.6%
2017	30.9%	41%
2016	30.2%	41.4%
2015	29.5%	41.8%
2014	28.9%	42.2%
2013	28.5%	42.5%
2012	28.1%	42.8%
2011	28%	43%
2010	27.9%	43.2%
2009	27.9%	43.4%
2008	28.1%	43.5%
2007	28.5%	43.6%
2006	29.1%	43.7%
2005	29.9%	43.8%
2004	30.8%	43.9%
2003	31.8%	43.9%
2002	32.9%	43.9%
2001	34.1%	43.9%
2000	35.2%	43.8%
1999	36.2%	43.7%
1998	37%	43.6%
1997	37.8%	43.5%
1996	38.4%	43.5%
1995	39%	43.4%
1994	39.5%	43.3%
1993	40%	43.2%
1992	40.5%	43.1%
1991	41%	43%
1990	41.4%	42.9%
1989	41.7%	42.9%
1988	41.8%	42.8%
1987	42%	42.7%
1986	42.1%	42.6%
1985	42.3%	42.5%
1984	42.5%	42.3%
1983	42.7%	42.2%
1982	43%	42.1%
1981	43.3%	42%
1980	43.7%	41.9%
1979	44.1%	41.8%
1978	44.5%	41.7%
1977	44.8%	41.6%
1976	45.2%	41.4%
1975	45.4%	41.3%
1974	45.6%	41.1%
1973	45.8%	40.9%
1972	45.8%	40.7%
1971	45.8%	40.6%
1970	45.6%	40.3%
1969	45.4%	40.1%
1968	44.9%	39.9%
1967	44.2%	39.6%
1966	43.3%	39.4%
1965	42.4%	39.1%
1964	41.4%	38.8%
1963	40.4%	38.5%
1962	39.6%	38.3%
1961	38.8%	38.3%
1960	38.1%	38.2%

Children aged 0-14 make up 32.2% of the population in Mongolia and 38.1% in Sierra Leone in 2024, compared to 41.4% and 42.9% respectively in 1990.

Demographics of Mongolia and Sierra Leone compared.

Maternal mortality chart: Mongolia vs Sierra Leone

Chart Table

Mongolia

Sierra Leone

1x

Year	Maternal mortality per 100K births
	Mongolia	Sierra Leone
2023	41	354
2022	41	370
2021	63	403
2020	47	422
2019	45	464
2018	45	491
2017	45	578
2016	48	633
2015	52	730
2014	56	821
2013	59	842
2012	63	915
2011	67	967
2010	71	1,018
2009	75	1,054
2008	77	1,093
2007	81	1,132
2006	90	1,168
2005	99	1,294
2004	108	1,366
2003	114	1,433
2002	120	1,492
2001	130	1,518
2000	144	1,603
1999	162	1,731
1998	174	1,753
1997	180	1,721
1996	178	1,726
1995	176	1,777
1994	178	1,755
1993	181	1,696
1992	199	1,681
1991	227	1,699
1990	276	1,572
1989	311	1,575
1988	335	1,549
1987	341	1,533
1986	346	1,530
1985	352	1,506

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 41 deaths per 100,000 live births in Mongolia, compared to 354 deaths in Sierra Leone.

Under-five mortality rates

Chart Table

Mongolia

Sierra Leone

Probability that a newborn baby will die before reaching age five

1x

Year	Under 5 mortality rate
	Mongolia	Sierra Leone
2023	1.36%	9.43%
2022	1.39%	9.77%
2021	1.43%	10.1%
2020	1.48%	10.5%
2019	1.56%	10.9%
2018	1.64%	11.3%
2017	1.74%	11.8%
2016	1.84%	12.3%
2015	1.94%	13.8%
2014	2.04%	13.7%
2013	2.15%	13.9%
2012	2.28%	14.5%
2011	2.44%	15.2%
2010	2.63%	15.9%
2009	2.85%	16.6%
2008	3.11%	17.3%
2007	3.39%	18.1%
2006	3.71%	18.8%
2005	4.07%	19.4%
2004	4.45%	20.1%
2003	4.87%	20.7%
2002	5.32%	21.3%
2001	5.8%	21.8%
2000	6.29%	22.4%
1999	6.78%	22.9%
1998	7.27%	23.4%
1997	7.74%	23.9%
1996	8.19%	24.3%
1995	8.6%	24.7%
1994	9%	25%
1993	9.39%	25.3%
1992	9.78%	25.5%
1991	10.2%	25.7%
1990	10.7%	25.9%
1989	11.1%	26.2%
1988	11.7%	26.4%
1987	12.2%	26.6%
1986	12.8%	26.9%
1985	13.4%	27.2%
1984	13.9%	27.5%
1983	14.4%	27.8%
1982	15%	28.1%
1981	15.5%	28.5%
1980	16.1%	28.9%
1979	16.7%	29.2%
1978	17.3%	29.6%
1977	-	30%
1976	-	30.5%
1975	-	30.9%
1974	-	31.4%
1973	-	31.9%
1972	-	32.3%
1971	-	32.9%
1970	-	33.4%
1969	-	33.9%
1968	-	34.5%
1967	-	35%
1966	-	35.6%
1965	-	36.2%
1964	-	36.8%
1963	-	37.4%
1962	-	38%
1961	-	38.5%
1960	-	39.1%

The chance that a newborn baby will die before reaching age five is 1.36% in Mongolia and 9.43% in Sierra Leone. Above is a chart with historical data on under-five mortality rates.