I acquired 2013 census data. I had erroneously assigned Koungheul department to Kaolack region. It's in Kaffrine. I've fixed that now.

Senegal is divided into regions, which are subdivided into d�partements (departments). Most of the departments are further subdivided into arrondissements, and then into communes; some departments have no subdivisions.

I acquired areas and populations for the departments as of 2005 from several sources, but none of them were complete. I had to do some combining and shuffling. The data shown in the last table in the Change history section are my best approximation.

Several new departments were created in 2002-02-21. The table below shows the departments of Senegal at that time.

Department	HASC	Population
Bakel	SN.TB.BK	138,867
Bambey	SN.DB.BB	299,476
Bignona	SN.ZG.BG	252,556
Birkilane	SN.KF.BR	101,216
Bounkiling	SN.SD.BL	145,569
Dagana	SN.ST.DG	241,695
Dakar	SN.DK.DK	1,146,053
Diourbel	SN.DB.DB	268,215
Fatick	SN.FK.FK	339,241
Foundiougne	SN.FK.FD	279,436
Gossas	SN.FK.GS	95,715
Goudiry	SN.TB.GY	114,846
Goudomp	SN.SD.GP	156,097
Gu�diawaye	SN.DK.GD	329,659
Guinguin�o	SN.KC.GG	115,183
Kaffrine	SN.KF.KF	207,676
Kanel	SN.MT.KN	238,606
Kaolack	SN.KC.KL	488,765
K�b�mer	SN.LG.KB	259,085
K�dougou	SN.KG.KG	78,522
Kolda	SN.KO.KD	245,990
Koumpentoum	SN.TB.KP	128,433
Koungheul	SN.KF.KU	163,438
Lingu�re	SN.LG.LN	241,897
Louga	SN.LG.LG	373,211
Mal�me Hodar	SN.KF.MH	94,662
Matam	SN.MT.MT	272,620
Mback�	SN.DB.MK	929,764
Mbour	SN.TH.MR	668,878
M�dina Yoro Foula	SN.KO.YF	138,084
Nioro du Rip	SN.KC.NR	356,927
Oussouye	SN.ZG.OU	48,331
Pikine	SN.DK.PK	1,170,791
Podor	SN.ST.PD	370,751
Ran�rou Ferlo	SN.MT.RN	51,313
Rufisque	SN.DK.RF	490,694
Saint-Louis	SN.ST.SL	296,497
Sal�mata	SN.KG.SM	22,111
Saraya	SN.KG.SY	50,724
S�dhiou	SN.SD.SD	151,327
Tambacounda	SN.TB.TC	299,163
Thi�s	SN.TH.TH	667,814
Tivaouane	SN.TH.TV	452,172
V�lingara	SN.KO.VL	278,381
Ziguinchor	SN.ZG.ZG	248,264
HASC: Hierarchical administrative subdivision codes. The middle two letters identify the region. For key, see Regions of Senegal page. Population: 2013-12-09 census.

Change history:

1. 1962: Senegal was divided into seven regions, subdivided into 28 circles, further subdivided into 86 arrondissements.
2. 1972-1980: circles were progressively supplanted by departments. On 1972-02-01, Thi�s region was reorganized into Mbour, Thi�s, and Tivaouane departments. On 1974-02-09, Sine-Saloum region was reorganized into six departments. On 1976-06-26, Diourbel region was reorganized into two regions (Diourbel and Louga), each consisting of three departments. In 1978, Casamance region was reorganized into six departments. In 1980, Fleuve region was reorganized into three departments.
3. ~1984: Dakar region, formerly monodepartmental, was subdivided into Dakar, Pikine, and Rufisque departments. Also, some time between 1973 and 1995, an area of 298 km.� was transferred from Mbour to Thi�s department.
4. The departments as of 2001 are listed in the following table. There is a map of the departments at this stage in the online book Population Dynamics of Senegal .

Department	HASC	Population	Area(km.²)
Bakel	SN.TC.BK	140,824	22,378
Bambey	SN.DB.BB	234,532	1,351
Bignona	SN.ZG.BG	178,020	5,295
Dagana	SN.SL.DG	355,422	6,087
Dakar	SN.DK.DK	822,830	83
Diourbel	SN.DB.DB	215,265	1,175
Fatick	SN.FK.FK	238,974	2,646
Foundiougne	SN.FK.FD	173,363	2,959
Gossas	SN.FK.GS	182,066	2,330
Kaffrine	SN.KL.KF	402,101	11,853
Kaolack	SN.KL.KL	376,693	1,880
K�b�mer	SN.LG.KB	164,370	3,823
K�dougou	SN.TC.KG	74,746	16,896
Kolda	SN.KD.KD	234,202	8,284
Lingu�re	SN.LG.LN	168,073	19,716
Louga	SN.LG.LG	210,897	5,649
Matam	SN.SL.MT	263,373	25,093
Mback�	SN.DB.MK	351,257	1,833
Mbour	SN.TH.MR	371,668	1,607
Nioro du Rip	SN.KL.NR	234,013	2,277
Oussouye	SN.ZG.OU	45,658	891
Pikine	SN.DK.PK	947,238	95
Podor	SN.SL.PD	162,101	12,947
Rufisque	SN.DK.RF	245,470	372
S�dhiou	SN.KD.SD	361,554	7,293
Tambacounda	SN.TC.TC	262,311	20,328
Thi�s	SN.TH.TH	472,974	1,873
Tivaouane	SN.TH.TV	348,071	3,121
V�lingara	SN.KD.VL	154,539	5,434
Ziguinchor	SN.ZG.ZG	240,346	1,153
HASC: Hierarchical administrative subdivision codes. Population: 1996-12-31 estimate. Source for populations and areas is Trade Point Senegal, adjusted for consistency. Capitals: Have the same name as their departments.

1. 2002-02-21: Saint-Louis department split from Dagana; Matam department formed from parts of Lingu�re and former Matam department; the remainder of former Matam department split into Kanel and Ran�rou Ferlo departments; Gu�diawaye department split from Pikine. This table shows the departments that resulted.

Department	HASC	Population	Area(km.²)
Bakel	SN.TC.BK	215,680	22,378
Bambey	SN.DB.BB	252,532	1,351
Bignona	SN.ZG.BG	224,617	5,295
Dagana	SN.ST.DG	207,991	5,208
Dakar	SN.DK.DK	1,030,594	79
Diourbel	SN.DB.DB	220,221	1,175
Fatick	SN.FK.FK	267,756	2,646
Foundiougne	SN.FK.FD	224,659	2,959
Gossas	SN.FK.GS	159,946	2,330
Gu�diawaye	SN.DK.GD	286,989	13
Kaffrine	SN.KL.KF	467,748	11,853
Kanel	SN.MT.KN	196,919	9,783
Kaolack	SN.KL.KL	382,784	1,880
K�b�mer	SN.LG.KB	215,648	3,823
K�dougou	SN.TC.KG	111,207	16,896
Kolda	SN.KD.KD	306,591	8,284
Lingu�re	SN.LG.LN	214,883	19,716
Louga	SN.LG.LG	299,075	4,911
Matam	SN.MT.MT	233,179	12,700
Mback�	SN.DB.MK	710,342	1,833
Mbour	SN.TH.MR	513,278	1,607
Nioro du Rip	SN.KL.NR	282,175	2,277
Oussouye	SN.ZG.OU	36,506	891
Pikine	SN.DK.PK	834,246	87
Podor	SN.ST.PD	329,379	12,947
Ran�rou Ferlo	SN.MT.RN	48,475	2,600
Rufisque	SN.DK.RF	307,463	372
Saint-Louis	SN.ST.SL	226,977	879
S�dhiou	SN.KD.SD	399,365	7,293
Tambacounda	SN.TC.TC	342,204	20,328
Thi�s	SN.TH.TH	529,261	1,873
Tivaouane	SN.TH.TV	342,519	3,121
V�lingara	SN.KD.VL	206,547	5,434
Ziguinchor	SN.ZG.ZG	192,325	1,153
HASC: Hierarchical administrative subdivision codes. The middle two letters identify the region. For key, see Regions of Senegal page. Population: 2005 estimate. Capital: Capitals have the same names as their departments, except that Ran�rou is the capital of Ran�rou Ferlo.

1. 2006: Koungheul arrondissement removed from Kaffrine to become a new department.
2. 2008-02-01: Ten new departments formed in the process of creating three new regions.

Other names of subdivisions:

1. Birkilane: Birkelane (variant)
2. Koumpentoum: Koupentoum (variant)
3. Mal�me Hodar: Malem Hoddar (variant)
4. M�dina Yoro Foula: Medina Yoro Foulah (variant)
5. Mback�: M'Back� (variant)
6. Mbour: M'Bour (variant)
7. Nioro du Rip: Nioro (variant)
8. Ran�rou Ferlo: Ranerou (variant)