Solidaridad is one of the eleven municipalities that make up the Mexican state of Quintana Roo. Its municipal seat is the town of Playa del Carmen.

Solidaridad is home to the Maya archaeological site of Xcaret.

The municipality has some small but rich continental sites including the ecotourism park of Xcaret. Prior to the creation of the Municipality of Tulum, the municipality was situated between latitudes 20° 45' and 19° 46' north and longitudes 86° 57' and 88° 05' west, and had an area of 4,245.67 square kilometres (1,639.26 sq mi). Today, it borders the municipalities of Benito Juárez and Lázaro Cárdenas to the north and Tulum to the south; and is separated in most places from its neighboring municipality to the east (Cozumel) by a stretch of the Caribbean Sea known as the Cozumel Channel.

The ecotourism park of Xel-Ha and the Calica limestone quarry are not part of Solidaridad as they belong to the neighboring municipality of Cozumel. These are the only two mainland locations for the municipality of Cozumel with sizes of 90 hectares (220 acres) and 11.9 hectares (29 acres) respectively. All of the limestone from Calica is exported to the US, and the quarry has its own docks and also serves visiting cruise ships.

Like most of the Yucatan Peninsula, Solidaridad is almost entirely flat with a gentle slope towards the sea, so from west to east, most of the area never reaches an altitude above 25 metres (82 ft) above sea level.

Like the rest of the peninsula's surface the land has a limestone base that does not allow the formation of surface water flows such as rivers and streams, the water instead form flows in underground rivers that sometimes rise to the surface in the cenotes. Lakes and cenotes are the major water bodies of the municipality.

The largest localities (cities, towns, and villages) are:

Name	Population (2010 census)
Playa del Carmen	149,923
Puerto Aventuras	5,979
Barceló Maya	606
Grand Palladium	334
Cárcel Pública	314
Iberostar	242
Felipe Carrillo Puerto	176
Punta Laguna	138
El Dorado	131
Hidalgo y Cortez	128
Grand Sirenis	125
Total municipality	159,310

Solidaridad is one of the youngest municipalities in the country: it was formed on July 28, 1993, by decree of the State Congress during the administration of Mario Villanueva Madrid. At this time the municipality of Cozumel was split into two, with the mainland section constituting the new municipality of Solidaridad.

On March 13, 2008, Solidaridad was split in two when the new Municipality of Tulum was formed, as a result its land area and population were adjusted.

Historical population

Year	Pop.	±% p.a.
1995	28,747	—
2000	63,752	+17.27%
2005	135,512	+16.28%
2010	159,310	+3.29%
Source: INEGI Instituto Nacional de Estadística y Geografía

The municipality has a population of 159,310 according to the results of the Population and Housing Census of 2010 conducted by the National Institute of Statistics and Geography (Instituto Nacional de Estadística y Geografía), of these, 83,468 are men and 75,842 are women. By this time, Tulum Municipality was already separated from Solidaridad.

Currently most of its population are immigrants, mainly from the southeastern states of Mexico; but also, according to the National Institute of Migration, Mexico (Instituto Nacional de Migración de México), the municipality has 12 percent of its population of foreign origin.

• Official Municipo Solidaridad website—(in Spanish)