Cities near Rio das Ostras

Rio das Ostras is a city of 168,099 inhabitants in Brazil. The most populous cities near Rio das Ostras within 100 km are Itaboraí, Cabo Frio, Maricá. Distances are measured as the crow flies.

Use the map and table below to explore the cities near Rio das Ostras.

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Latitude: -22.5269° Longitude: -41.9450° Population: 168,099 Timezone: America/Sao_Paulo

Nearby cities 29 cities found

Sorted by population, from largest to smallest. Distances are measured as the crow flies.

City	Country	Distance	Population
Itaboraí	Brazil	96.9 km	240,040
Cabo Frio	Brazil	40.9 km	238,166
Maricá	Brazil	99.7 km	211,986
Nova Friburgo	Brazil	66.1 km	191,158
Macaé	Brazil	22.9 km	143,029
Araruama	Brazil	56.1 km	137,773
São Pedro da Aldeia	Brazil	38.3 km	110,556
Saquarema	Brazil	67.9 km	95,201
Cachoeiras de Macacu	Brazil	73.1 km	59,837
Rio Bonito	Brazil	71.2 km	59,113
Casimiro de Abreu	Brazil	27.1 km	48,563
Armação dos Búzios	Brazil	25.3 km	42,442
São Fidélis	Brazil	100.0 km	41,197
Tanguá	Brazil	82.1 km	32,858
Arraial do Cabo	Brazil	49.6 km	32,794
Bom Jardim	Brazil	64.2 km	29,736
Iguaba Grande	Brazil	45.3 km	29,577
Itaocara	Brazil	96.3 km	23,643
Quissamã	Brazil	67.4 km	23,126
Silva Jardim	Brazil	47.9 km	22,026
Conceição de Macabu	Brazil	49.7 km	21,769
Cordeiro	Brazil	70.0 km	21,444
Cantagalo	Brazil	74.7 km	19,996
Carmo	Brazil	95.0 km	17,740
Sumidouro	Brazil	91.9 km	15,690
Carapebus	Brazil	47.7 km	14,325
Duas Barras	Brazil	79.5 km	11,354
Trajano de Morais	Brazil	53.0 km	10,652
Santa Maria Madalena	Brazil	63.9 km	10,579

What is this tool?

The Cities Near tool lets you explore all populated places within a chosen radius of any city in the world. Enter a city, pick a radius (50, 100, 200, or 500 km), and get an instant interactive map and list — sorted from most to least populous.

This is useful for trip planning, geography research, or simply satisfying your curiosity about what lies around a given city. The underlying dataset comes from GeoNames and covers 70,000+ populated places worldwide.

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How far is Rio das Ostras from other cities?

Use the form below to find the distance from Rio das Ostras to any other city in the world.

How does the distance calculation work?

Distances are calculated using the Haversine formula, which gives the great-circle distance between two points on a sphere — the shortest path over the Earth's surface. The result is accurate to within a few kilometres for most city pairs. Note that the Haversine formula assumes a perfectly spherical Earth; the true Earth is slightly flattened, so very long distances may differ by up to 0.5% from the exact geodetic distance.

Cities near famous places

Within 100 km of Paris: Versailles, Chartres, Reims, Rouen — all classic day-trip destinations.
Within 200 km of Tokyo: Yokohama, Kawasaki, Sagamihara, Chiba, Shizuoka — the vast Kantō metropolitan area.
Within 500 km of Istanbul: Ankara, Bursa, Thessaloniki, Sofia, Izmir — crossing into three countries.

Frequently Asked Questions

What is the maximum radius I can search?

The tool offers radii of 50, 100, 200, and 500 km. For reference, a 500 km radius around Paris would cover most of France plus parts of Belgium, Germany, and Switzerland. Use the minimum population filter to narrow down the results to cities of the size you care about.

How is distance measured — straight line or road distance?

The distance shown is the straight-line great-circle distance (as the crow flies), not the road distance. Road distances are always longer due to routes, terrain, and urban layouts. This tool is intended for geographic exploration, not navigation.

What data source is used?

City data comes from the GeoNames geographical database, which aggregates official government sources worldwide. It includes name, coordinates, population, country, and timezone for over 70,000 populated places. Coordinates are accurate to 4–6 decimal places.