The following are the 20 most populated cities in Peru. Note that the populations are strictly within city limits and not metropolitan area figures. For metropolitan figures see List of 15 largest metropolitan areas in Peru.

20 Most Populated Cities in Peru
Rank	City	Census 2007	Year 2011	Departament
		City Population	City Population	or Region
1.	Lima-Callao	3.573.227	6 321 173	8 472 935	Lima
2.	Arequipa Arequipa Arequipa is the capital city of the Arequipa Region in southern Peru. With a population of 836,859 it is the second most populous city of the country...	446.942	619 156	815 166	Arequipa
3.	Trujillo Trujillo, Peru Trujillo, in northwestern Peru, is the capital of the La Libertad Region, and the third largest city in Peru. The urban area has 811,979 inhabitants and is an economic hub in northern Peru...	354.301	509 312	790 459	La Libertad
4.	Chiclayo Chiclayo Chiclayo is the capital city of the Lambayeque region in northern Peru. It is located 13 kilometers inland from the Pacific coast and 770 kilometers from the nation's capital, Lima...	279 527	379 520	574 408	Lambayeque
5.	Piura Piura Piura is a city in northwestern Peru. It is the capital of the Piura Region and the Piura Province. The population is 377,496.It was here that Spanish Conqueror Francisco Pizarro founded the third Spanish city in South America and first in Peru, San Miguel de Piura, in July 1532...	207.934	277 964	441 769	Piura
6.	Iquitos Iquitos Iquitos is the largest city in the Peruvian rainforest, with a population of 370,962. It is the capital of Loreto Region and Maynas Province.Located on the Amazon River, it is only above sea level, although it is more than from the mouth of the Amazon at Belém on the Atlantic Ocean...	178.738	274 759	370 962	Loreto
7.	Cusco Cusco Cusco , often spelled Cuzco , is a city in southeastern Peru, near the Urubamba Valley of the Andes mountain range. It is the capital of the Cusco Region as well as the Cuzco Province. In 2007, the city had a population of 358,935 which was triple the figure of 20 years ago...	184.550	255 568	348 935	Cusco
8.	Chimbote Chimbote Chimbote is the largest city in the Ancash Region of Peru, and the capital of both Santa Province and Chimbote District.The city is located on the coast in Chimbote Bay, south of Trujillo and north of Lima on the North Pan-American highway. It is the start of a chain of important cities like...	164.954	282 279	334 568	Ancash
9.	Huancayo Huancayo Huancayo with a rock') is the capital of the Junín Region, in the central highlands of Peru. It is located in Junín Province, of which it is also capital. Situated near the Mantaro Valley at an altitude of 3,271 meters, it has a population of 377,000 and is the fifth most populous city of the...	223.341	258 209	323 054	Junín
10.	Pucallpa Pucallpa Pucallpa is a city in eastern Peru located on the banks of the Ucayali River, a major tributary of the Amazon River. It is the capital of the Ucayali region, the Coronel Portillo Province and the Calleria District....	87.651	172 286	272 616	Ucayali
11.	Tacna Tacna - Rail :Tacna is served by a cross-border standard gauge railway to Arica, Chile.It is also the location of the National Railway Museum of Peru.-Air:Tacna is served by the Crnl. FAP...	89.604	174 336	242 451	Tacna
12.	Ica ICA - Business :* Empresas ICA , large construction company in Mexico* ICA AB, a Swedish corporate group in the food retail business, formerly named ICA Ahold AB....	53.000	168 998	219 856	Ica
13.	Juliaca Juliaca Juliaca is San Roman's capital city in Puno Region, which is situated in southeastern Peru. It is the region's largest city with a population of 225,146 inhabitants , on the Altiplano, Juliaca above sea level, is located in the Collao Plateau and it is northwest of Lake Titicaca...	112.770	142 576	216 716	Puno
14.	Sullana Sullana Sullana is the name of the capital of the Sullana Province, in the north-western coastal plains of Peru on the Chira valley.-Location:Sullana is located at 04°53' south latitude and 80°41' west longitude, 38 km north of Piura, the capital of the region.-Climate:The province has a tropical...	114.786	147 361	181 954	| Piura
15.	Cajamarca Cajamarca Cajamarca may refer to:Colombia*Cajamarca, Tolima a town and municipality in Tolima DepartmentPeru* Cajamarca, city in Peru.* Cajamarca District, district in the Cajamarca province.* Cajamarca Province, province in the Cajamarca region....	65.000	92 447	162 326	Cajamarca
16.	Chincha Alta Chincha The Chincha were a Native American people of the Andes. They are discussed by Maria Rostworowski de Diez Canseco in "History of the Inca Realm" and by Justo Caceres Macedo in "Prehispanic Cultures of Peru"...	75.685	110 016	153 598	Ica
17.	Ayacucho Ayacucho Ayacucho is the capital city of Huamanga Province, Ayacucho Region, Peru.Ayacucho is famous for its 33 churches, which represent one for each year of Jesus's life. Ayacucho has large religious celebrations, especially during the Holy Week of Easter...	61.812	105 918	151 019	Ayacucho
18.	Huánuco Huánuco -Famous Natives:* Daniel Alomía Robles - Musical composer and ethnologist born in 1871, famous for El Cóndor Pasa* Johan Fano- Professional football player-External links:*** - Catholic Encyclopedia article...	47.936	118 814	149 210	Huánuco
19.	Huacho Huacho Huacho is a city in Peru, capital of the Huaura Province and capital of the Lima Region. It is located 223 feet above sea level and 148 km north of the city of Lima...	58 894	88 894	138 894	Lima
20.	Puno Puno Puno is a city in southeastern Peru, located on the shore of Lake Titicaca. It is the capital city of the Puno Region and the Puno Province with a population of approximately 100,000. The city was established in 1668 by viceroy Pedro Antonio Fernández de Castro as capital of the province of...	69.553	91 877	120 229	Puno

The next are data from most populated cities in Peru in year 2011:

• At year 2011 Lima
  Lima
  Lima is the capital and the largest city of Peru. It is located in the valleys of the Chillón, Rímac and Lurín rivers, in the central part of the country, on a desert coast overlooking the Pacific Ocean. Together with the seaport of Callao, it forms a contiguous urban area known as the Lima...
  
   city is formed by 43 districts of Lima Province
  Lima Province
  Lima Province is located in the central coast of Peru and is the only province in the country not belonging to any of the twenty-five regions. Its capital is Lima, which is also the nation's capital....
  
    and 6 districts of Callao Province making a total of 49 districs that form the city.

• At year 2011 Trujillo
  Trujillo, Peru
  Trujillo, in northwestern Peru, is the capital of the La Libertad Region, and the third largest city in Peru. The urban area has 811,979 inhabitants and is an economic hub in northern Peru...
  
   city is formed by 7 continuous urban districts which are : Trujillo, La Esperanza, El Porvenir, Víctor Larco, Florencia de Mora.

• At year 2011 Arequipa
  Arequipa
  Arequipa is the capital city of the Arequipa Region in southern Peru. With a population of 836,859 it is the second most populous city of the country...
  
   city is formed by 14 urban districts which are : Arequipa, Alto Selva alegre, Cayma, Cerro colorado, Jacobo hunter, José Luís Bustamante y Rivero, Mariano Melgar, Miraflores, Paucarpata, Sabandia, Sachaca, Socabaya, Tiabaya and Yanahuara.

• At year 2011 Chiclayo
  Chiclayo
  Chiclayo is the capital city of the Lambayeque region in northern Peru. It is located 13 kilometers inland from the Pacific coast and 770 kilometers from the nation's capital, Lima...
  
   city is formed by 6 urban districts which are : Chiclayo, José Leonardo Ortiz, La Victoria, Pomalca, Reque and Pimentel.

• At year 2011 Piura
  Piura
  Piura is a city in northwestern Peru. It is the capital of the Piura Region and the Piura Province. The population is 377,496.It was here that Spanish Conqueror Francisco Pizarro founded the third Spanish city in South America and first in Peru, San Miguel de Piura, in July 1532...
  
   city is formed by 3 urban districts which are : Piura,Castilla and Catacaos.

• At year 2011 Iquitos
  Iquitos
  Iquitos is the largest city in the Peruvian rainforest, with a population of 370,962. It is the capital of Loreto Region and Maynas Province.Located on the Amazon River, it is only above sea level, although it is more than from the mouth of the Amazon at Belém on the Atlantic Ocean...
  
   city is formed by 4 urban districts which are : Iquitos, Punchana, Beén and San Juan Bautista.

• At year 2011 Cusco
  Cusco
  Cusco , often spelled Cuzco , is a city in southeastern Peru, near the Urubamba Valley of the Andes mountain range. It is the capital of the Cusco Region as well as the Cuzco Province. In 2007, the city had a population of 358,935 which was triple the figure of 20 years ago...
  
   city is formed by 5 districts which are : Cuzco, San Jerónimo, San Sebastián, Santiago y Wanchaq.

• At year 2011 Chimbote
  Chimbote
  Chimbote is the largest city in the Ancash Region of Peru, and the capital of both Santa Province and Chimbote District.The city is located on the coast in Chimbote Bay, south of Trujillo and north of Lima on the North Pan-American highway. It is the start of a chain of important cities like...
  
   city is formed by 2 continuous urban districts which are : Chimbote and Nuevo Chimbote.

• At year 2011 Huancayo
  Huancayo
  Huancayo with a rock') is the capital of the Junín Region, in the central highlands of Peru. It is located in Junín Province, of which it is also capital. Situated near the Mantaro Valley at an altitude of 3,271 meters, it has a population of 377,000 and is the fifth most populous city of the...
  
   city is formed by 3 urban districts which are : Huancayo, Chilca and El Tambo.
• At year 2011 Tacna
  Tacna
  - Rail :Tacna is served by a cross-border standard gauge railway to Arica, Chile.It is also the location of the National Railway Museum of Peru.-Air:Tacna is served by the Crnl. FAP...
  
   city is formed by 5 urban districts which are : Tacna, Coronel Gregorio Albarracín Lanchipa, Alto de la Alianza, Ciudad Nueva and Pocollay.

• At year 2011 Ica
  Ica (city)
  The city of Ica is the capital of the Ica Region in southern Peru. While the area was long inhabited by varying cultures of indigenous peoples, the Spanish conquistador Gerónimo Luis de Cabrera claimed its founding in 1563. As of 2005, it had an estimated population of over 219,856...
  
   city is formed by 7 urban districts which are : Ica, La Tinguiña, Los Aquijes, Parcona, San Juan Bautista, Pueblo Nuevo and Santiago.

• At year 2011 Juliaca
  Juliaca
  Juliaca is San Roman's capital city in Puno Region, which is situated in southeastern Peru. It is the region's largest city with a population of 225,146 inhabitants , on the Altiplano, Juliaca above sea level, is located in the Collao Plateau and it is northwest of Lake Titicaca...
  
   city is formed by 2 urban districts which are : Juliaca and Caracoto.

• At year 2011 Pucallpa
  Pucallpa
  Pucallpa is a city in eastern Peru located on the banks of the Ucayali River, a major tributary of the Amazon River. It is the capital of the Ucayali region, the Coronel Portillo Province and the Calleria District....
  
   city is formed by 3 urban districts which are : Callería (district origin of Pucallpa), Yarinacocha and Manantay.

• At year 2011 Cajamarca
  Cajamarca
  Cajamarca may refer to:Colombia*Cajamarca, Tolima a town and municipality in Tolima DepartmentPeru* Cajamarca, city in Peru.* Cajamarca District, district in the Cajamarca province.* Cajamarca Province, province in the Cajamarca region....
  
   city is formed by 2 urban districts which are : Cajamarca and Baños del Inca.

• At year 2011 Sullana
  Sullana
  Sullana is the name of the capital of the Sullana Province, in the north-western coastal plains of Peru on the Chira valley.-Location:Sullana is located at 04°53' south latitude and 80°41' west longitude, 38 km north of Piura, the capital of the region.-Climate:The province has a tropical...
  
   city is formed by 2 urban districts which are : Sullana and Bellavista.

• At year 2011 Ayacucho
  Ayacucho
  Ayacucho is the capital city of Huamanga Province, Ayacucho Region, Peru.Ayacucho is famous for its 33 churches, which represent one for each year of Jesus's life. Ayacucho has large religious celebrations, especially during the Holy Week of Easter...
  
   city is formed by 4 urban districts which are : Ayacucho, Carmen Alto, San Juan Bautista and Jesús Nazareno.

• At year 2011 Huánuco
  Huánuco
  -Famous Natives:* Daniel Alomía Robles - Musical composer and ethnologist born in 1871, famous for El Cóndor Pasa* Johan Fano- Professional football player-External links:*** - Catholic Encyclopedia article...
  
   city is formed by 3 urban districts which are : Huánuco, Amarilis and Pillco Marca.

• At year 2011 Huacho
  Huacho
  Huacho is a city in Peru, capital of the Huaura Province and capital of the Lima Region. It is located 223 feet above sea level and 148 km north of the city of Lima...
  
   city is formed by 5 urban districts which are : Huacho, Caleta de Carquín, Hualmay, Huaura and Santa maría.

• At year 2011 Tarapoto
  Tarapoto
  Tarapoto, known as the "City of Palms", is a thriving commercial hub in northern Peru, an hour by plane from Lima, situated in the San Martín Province of the San Martín Region, located in the high jungle plateau to the east of what is known as the selva baja...
  
  city is formed by 3 urban districts which are : Tarapoto, Banda de Shilcayo and Morales.

References:

• http://www.inei.gob.pe/biblioineipub/bancopub/Est/Lib0842/index.htm
• http://www.saludarequipa.gob.pe/
• http://www.diresalalibertad.gob.pe/
• http://www.minsa.gob.pe/
• http://www.munichiclayo.gob.pe/g_urbanismo/