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The 1995 Mid-Decade Population Count of the municipality showed that the town has a total population of 31,421. For year 2000 base on the National Statistics Population Census the result was 35,176 with household number of 6,468. And for the year 2005, it has a total population of 38,780 with household number 7,211. For year 2007, it has a total population of 40,323 with household number 7,517. For 2008, it has a total population of 41,117 with 7,663 numbers of households and 2009, it has 41,927 population and 7,813 households. For year 2016, it has a total population of 41,117 and 7,663 Household number, in year 2017 it has a total population of 37,054 with a total household 8,361, Out of the total population of the municipality 48.34% are females and 51.66% males. It has an annual growth rate 2.09 following the growth rate of the province. The age distribution of Naga is evidently young with 20,521 (57.63%) aged 0-24 years old, 15,044 (40.60%) aged 25-65 years old only 1,489 (4.01 %) are above the 65 years old bracket.

Total Population as of August 1, 2017 (Source: CBMS)

NAME OF BARANGAY	NO. OF HH (Estimated)	2017 POPULATION	HH SIZE
AGUINALDO	394	1,728	4
BAGA	383	1,635	4
BALUNO	307	1,599	5
BANGKAW-BANGKAW	151	767	5
CABONG	105	405	4
CROSSING STA. CLARA	567	2,351	4
GUBAWANG	141	641	5
GUINTOLOAN	284	1,277	4
KALIANTANA	420	2348	6
LA PAZ	402	1,985	5
LOWER SULITAN	195	744	4
MAMAGON	402	1,898	5
MARSOLO	424	1,754	4
POBLACION	584	2,707	5
SAN ISIDRO	383	1,452	5
SANDAYONG	420	1,978	4
SANTA CLARA	1890	1,890	4
SULO	739	3,085	4
TAMBANAN	359	1,497	4
TAYTAY MANUBO	279	1,272	4
TILUBOG	242	1,065	4
TIPAN	316	1,489	5
UPPER SULITAN	379	1,487	4
TOTAL	8,361	37,054	4

No. of informal settlers – households: 1,803 HH

BARANGAY	2016 POPULATION	2016 NO. OF HH	2017 POPULATION	2017 NO. OF HH
1. POBLACION	3,957	811	1,728	394
2. AGUINALDO	1,536	313	1,635	383
3. BAGA	1,861	340	1,599	307
4. BALUNO	1,563	301	767	151
5. BANGKAW –BANGKAW	853	143	405	105
6. CABONG	499	94	2,351	567
7. CROSSING STA. CLARA	2,663	519	641	141
8. GUBAWANG	1,148	201	1,277	284
9. GUINTOLOAN	1,359	247	2348	420
10. KALIANTANA	1,816	322	1,985	402
11. LA PAZ	2,041	376	744	195
12. LOWER SULITAN	887	178	1,898	402
13. MAMAGON	1,838	300	1,754	424
14. MARSOLO	2,011	371	2,707	584
15. SAN ISIDRO	1,447	265	1,452	383
16. STA. CLARA	2,517	511	1,978	420
17. SULO	3,155	566	1,890	1890
18. SANDAYONG	1,750	311	3,085	739
19. TAMBANAN	1,482	238	1,497	359
20. TAYTAY MANUBO	2,106	404	1,272	279
21. TIPAN	1,691	273	1,065	242
22. TILUBOG	1,102	220	1,489	316
23. UPPER SULITAN	1,835	359	1,487	379
*TOTAL*	*41,117*	*7,663*	37,054	8,361

SOURCE: NSO 2000 AND CBMS 2017

Population by Mother Tongue: 2017

MOTHER TONGUE	POPULATION
MOTHER TONGUE	BOTH SEXES	MALE	FEMALE	% DISTRIBUTION
Tagalog	23	12	11	006%
Cebuano/Bisaya/Binisaya/Boholano	22,936	11,712	11,224	61.90%
Hiligaynon	373	215	158	1.01%
Ilocano	44	34	10	0.12%
Pangasinan	1	1	0	0%
Waray	58	36	22	0.1%6
Bikol	15	9	6	0.04%
Maguindanao	372	188	184	1.00%
Maranao	8	6	2	0.02%
Tausug	3,012	1,546	1,466	8.13%
Chavacano	3	2	1	0.01%
Samal	3,137	1,567	1,570	8.47%
Subanen	5,243	2,747	2,496	14.15%
Surigaonon	24	13	11	0.06%
Other Local Dialects	1,805	911	894	4.87%
Total	37,054	18,999	18,055	100%

Population by Religious Affiliation: 2014

RELIGIOUS AFFILIATION	POPULATION	PERCENT DISTRIBUTION
Roman Catholic	32,250	69.05
Aglipay	150	0.32
Islam	6,385	13.67
Iglesiani Cristo	2,424	5.19
United Church of Christ in the Philippines	1,345	2.88
Church of Jesus Christ of the Latter Day Saints	10	0.02
Jehovah’s Witness	191	0.41
Philippine Benevolent Missionaries Association	107	0.23
Seventh Day Adventist	570	1.22
Baptist Conference of the Philippines	47	0.10
Bible Baptist	37	0.08
Other Baptist	19	0.04
Iglesia Evangelista Methodista en Las Filipinas	5	0.01
Alliance of Bible Committees	93	0.20
Assemblies of God	42	0.09
Christian and Missionary Alliance	911	1.95
Other Protestants	1,326	2.84
Not Stated	794	1.70
Total	46,706	100%

Population by Age Group: 2017(CBMS)

AGE GROUP	BOTH SEXES	FEMALE	MALE
UNDER 1	766	370	396
1-4	3,278	1,598	1,680
5	958	470	488
6	976	485	491
7	899	430	469
8	879	398	481
9	909	443	466
10	896	451	445
11	919	452	467
12	999	477	522
13	947	434	513
14	863	440	423
15	752	360	392
16	765	370	395
17	787	381	406
18	646	304	342
19	697	320	377
20-24	3,585	1,728	1,857
25-29	2,960	1,455	1,505
30-34	2,418	1,138	1,280
35-39	2,166	977	1,189
40-44	1,953	920	1,033
45-49	1,720	847	873
50-54	1,493	761	732
55-59	1,276	607	669
60-64	1,058	506	552
65-69	597	268	329
70-74	390	216	174
75-79	291	170	121
80 & over	211	133	78
Total	37,504	17,909	19,145

Population Density:

Municipality of Naga is generally thinly populated. In fact, its general density is two (2) people per one (1) hectare of land while its urban density is only 37 persons per hectare particular barangay Poblacion.

Historical Growth of Population: 1970 – 2000

YEAR	ACTUAL POPULATION	INCREASE/DECREASE	AVE. GROWTH RATE (%)
2017	37,054	-1493
2015	38,547	733	0.387
2010 (May 1)	37,814	465	0.415
2007 (Aug. 1)	37,349	2,173	0.885
2000 (May 1)	35,176	3,755	2.39
1995 (Sept. 1)	31,421	-161	-0.102
1990 (May 1)	31,582	7,373	3.045
1980 (May 1)	24,209	47	0.038
1975 (May 1)	24,162	3,571	3.468
1970 (May 6)	20,591

Topography:

On topographic feature, the municipality of Naga is generally hilly in character. It is 90% hilly and 10% lowland. Its elevation ranges from 20 feet above sea level which in the flattest point and about 100-300 feet above sea level being the extreme. The slope pattern is rolling with slopes varying from 1.00% in the lowland to about 25.00% in the mountainous part.

Climate:

The climatographical map from PAG-ASA shows that the climate of the municipality of Naga is of the fourth type wherein by the nature of its geographicallocation and its wide and extensive area, it experience different climatic condition. The southern part is relatively dry from November to May and wet duringthe rest of the year. Its rainfall is evenly distributed throughout the year. Thistype is however, typical and common to the rest of the provinces and localitiesin Western Mindanao. Average annual rainfall for the municipality is 194.70millimeters. Temperature is fairly warm throughout the year. Due to lack of dryseason, the relative humidity from January to May is 80% and 85% from Juneto December. As maybe observed, the highest values occur during wet months.Prevailing wind direction is southwesterly. The occurrence of typhoons in themunicipality is unheard of. The winds experiences in the area are merely theresults of depressions and monsoon winds.

AVERAGE MONTHLY RAINFUL, TEMPERATURE, HUMIDITY, DEW POINT, MEAN CLOUDNESS

	JAN	FEB	MAR	APR	MAY	JUNE	JULY	AUG	SEPT	OCT	NOV	DEC	AVE. YEARLY
RAINFALL (mm)	100	100	100	100	236.40	250	250	250	250	250	250	200	194.70
MEAN TEMPERATURE (ºC)	26	26	26.5	27.5	27.5	26.5	27	26	26	26.5	26.5	26.2	26.54 ºC
MEAN RELATIVE HUMIDY (%)	80	80	80	80	80	85	85	85	85	85	85	85	83%
MEAN DEW POINT (ºC)	22	22	22	24	23	23	23	23	23	23	23	23	23 ºC
MEAN CLOUDNESS(%SKY)	7	7	6	7	6	7	7	8	7	7	7	7	7% SKY

SOURCE: PAG-ASA, 1980

The people of the municipality traced the evolution of the term “NAGA” to three (3) traditional folklores. The first one believed that the word “NAGA” was coined from a mythological monster with seven heads known as the dragon. This dragon or Naga was believed to have been in existence and lived among the rocks of Singkilon and the thick forest which cover the whole area.

Read more: History

Municipality of Naga has an approximate total land area of twenty- four thousand six hundred thirty (24,630) hectares, of this 99.56% (24,527.013 hectares) considered as rural and the remaining 0.44% (108.2987 hectares being classified as urban, comprises the barangay Poblacion. It occupies 6.827% of the total land area of Zamboanga Sibugay (360,775 hectares). The 24,630 hectares was distributed among its twenty-three barangays. This total number of hectares is based on the record of the Land Evaluation Party, Forestry Management Services, Department of Environment and Natural Resources, Regional Office IX, Zamboanga City. The twenty-three (23) barangays within the jurisdiction of the municipality with their corresponding land area reflected as follows:

NAME OF BARANGAY	LAND AREA (hectares)
Poblacion	108.2987
Aguinaldo	171.1924
Baga	574.8518
Baluno	581.4204
Bangkaw-bangkaw	297.3406
Cabong	148.0533
Crossing Sta. Clara	562.6828
Gubawang	146.7301
Guintoloan	466.7490
Kaliantana	85.6743
La Paz	437.4864
Lower Sulitan	462.8846
Mamagon	763.2023
Marsolo	3,430.8831
San Isidro	654.8704
Sta. Clara	4,805.2783
Sulo	1,677.8473
Sandayong	2,122.7968
Tambanan	4,465.4943
Taytay Manubo	17.7748
Tipan	1,516.2087
Tilubog	572.2300
Upper Sulitan	560.0496
TOTAL	24,630.00 hectares

GENERAL CLASSIFICATION OF LAND USES
Land Uses	Hectares	Percentages
Agricultural Area	12.08	49.03
Forest Area	3,225.00	13.10
Mangrove and swamp area	3,600.00	14.62
Alienable/Disposable	69.00	0.28
Residential/Built-up areas	5,000.00	20.30
Tourism	10.00	0.04
Commercial	30.00	0.12
Institutional	55.00	0.22
Industrial	45.00	0.18
Infrastructure	500.00	2.03
Open Space Strip	20.00	0.08
Total	24,630.00	100 %

Urban Land Use	Hectares
Commercial	10.717
Institutional	8.000
Residential	50.455
Open Space	6.640
Roads	6.605
Agricultural	25.882
Total	108.299

The municipality of Naga is situated in the Western portion of the province of Zamboanga del Sur, Region IX and eastern portion of Ipil, the Provincial Center of Zamboanga Sibugay. It is 14 kilometers from the heart of Ipil and 12 kilometers to the center of Kabasalan.