Prosperidad, officially the Municipality of Prosperidad (Cebuano: Lungsod sa Prosperidad; Tagalog: Bayan ng Prosperidad), is a municipality and capital of the province of Agusan del Sur, Philippines. According to the 2020 census, it has a population of 88,321 people.

Prosperidad was created on June 18, 1960, through Republic Act No. 2650.

Prosperidad is the venue of the Naliyagan Festival, an annual event celebrated by the entire province of Agusan del Sur. It also hosts its own festival called the Angot Festival celebrated every 28 September in honor of St. Michael the Archangel.

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Prior to the Spanish Colonial Period, a Manobo settlement thrived at the junction of the Sianib and Gibong River. This settlement was known to the natives as Culilay.

During the Spanish Colonial Period, the missionaries discovered the settlement and soon began the Christianization of the Manobos. The natives were given Christian names and the settlement was renamed from Culilay to Las Navas", as the site was full of bancas, being the means of transportation at the time.

At the start of the American Period, Las Navas was bustling with local trades, but is experiencing constant flooding thus a new community,a business center cops up on a nearby site and was named 'Prosperidad' derived from the word Prospero or "progressive" as the place experienced growth and prosperity during the time of American Governor Zapanta.

According to the Philippine Statistics Authority, the municipality has a land area of 505.15 square kilometres (195.04 sq mi)  constituting 5.06% of the 9,989.52-square-kilometre (3,856.98 sq mi) total area of Agusan del Sur.

Prosperidad is politically subdivided into 32 barangays. Each barangay consists of puroks while some have sitios.

PSGC	Barangay	Population			±% p.a.
		2020		2010
160306001	Aurora	3.7%	3,251	2,999	▴	0.81%
160306002	Awa	2.1%	1,888	1,802	▴	0.47%
160306003	Azpetia	2.1%	1,850	1,708	▴	0.80%
160306006	La Caridad	2.0%	1,769	1,591	▴	1.07%
160306033	La Perian	0.9%	835	762	▴	0.92%
160306034	La Purisima	2.6%	2,276	2,224	▴	0.23%
160306007	La Suerte	2.0%	1,772	1,490	▴	1.75%
160306008	La Union	2.1%	1,853	1,509	▴	2.07%
160306009	Las Navas	2.0%	1,785	1,535	▴	1.52%
160306010	Libertad	1.1%	985	816	▴	1.90%
160306011	Los Arcos	3.0%	2,606	2,324	▴	1.15%
160306012	Lucena	4.0%	3,511	3,400	▴	0.32%
160306013	Mabuhay	2.3%	2,013	1,938	▴	0.38%
160306014	Magsaysay	2.6%	2,339	1,944	▴	1.87%
160306015	Mapaga	1.8%	1,558	1,394	▴	1.12%
160306017	Napo	1.1%	953	984	▾	−0.32%
160306016	New Maug	1.7%	1,480	1,460	▴	0.14%
160306018	Patin-ay	9.6%	8,505	7,562	▴	1.18%
160306004	Poblacion (Bahbah)	14.4%	12,731	12,180	▴	0.44%
160306020	Salimbogaon	0.9%	790	790		0.00%
160306021	Salvacion	3.0%	2,659	2,315	▴	1.39%
160306022	San Joaquin	1.9%	1,720	1,484	▴	1.49%
160306023	San Jose	2.9%	2,579	2,436	▴	0.57%
160306024	San Lorenzo	1.5%	1,310	1,483	▾	−1.23%
160306025	San Martin	2.7%	2,379	1,929	▴	2.12%
160306026	San Pedro	1.0%	851	1,395	▾	−4.82%
160306027	San Rafael	2.2%	1,973	1,918	▴	0.28%
160306035	San Roque	1.2%	1,093	719	▴	4.28%
160306029	San Salvador	1.8%	1,567	1,522	▴	0.29%
160306030	San Vicente	4.2%	3,728	3,444	▴	0.80%
160306031	Santa Irene	7.0%	6,148	5,899	▴	0.41%
160306032	Santa Maria	2.1%	1,874	1,672	▴	1.15%
	Total		88,321	76,628	▴	1.43%

Population census of Prosperidad

Year	Pop.	±% p.a.
1918	2,212	—
1939	4,180	+3.08%
1948	4,417	+0.61%
1960	12,438	+9.01%
1970	23,328	+6.48%
1975	26,557	+2.63%
1980	33,824	+4.95%
1990	51,189	+4.23%
1995	61,804	+3.59%
2000	70,815	+2.96%
2007	75,390	+0.87%
2010	76,628	+0.59%
2015	82,631	+1.45%
2020	88,321	+1.32%
Source: Philippine Statistics Authority

In the 2020 census, Prosperidad had a population of 88,321. The population density was 170 inhabitants per square kilometre (440/sq mi).

Poverty incidence of Prosperidad

10 20 30 40 50 60 2006 53.50 2009 52.80 2012 39.29 2015 40.26 2018 34.23 2021 37.59 Source: Philippine Statistics Authority

The Patin-ay Sports Complex (Officially known as Datu Lipus Makapandong - Democrito O. Plaza Sports Complex) has been constructed starting in the late 2018 and ends in year 2021. It has an artificial turf and rubberized track oval, the covered court has been upgraded, and the swimming pool will be upgraded into Olympic-size swimming pool. The main stadium capacity of the complex was 3,000, the aquatic center capacity was 1,500, and the basketball court capacity was 600. Once its finished, they will become the host for the future sporting events such as the upcoming Palarong Pambansa in 2026. The said complex which will cost of ₱700 Million. Opened in June 11, 2023 for the Naliyagan Festival events.

A satellite campus of the Philippine Normal University is located in Poblacion (popularly known as Bahbah) which was established in 1968.

Media related to Prosperidad at Wikimedia Commons

• Philippine Standard Geographic Code