---
title: Countries and regions
slug: commerce-connect-13/docs/countries-and-regions
docTags: 
createdAt: 2026-07-23T09:44:51.000Z
---

Countries and regions are used when configuring [markets](https://world.optimizely.com/documentation/developer-guides/commerce/markets/) and tax jurisdictions, and can also be used on the front-end when dealing with [Order management](docId\:BGk4sFEehxSs3CHyZa20q). On install, an extensive list of countries is created.

Classes in this topic are in the following namespaces:

- Mediachase.Commerce.Orders
- Mediachase.Commerce.Orders.Dto
- Mediachase.Commerce.Orders.Managers

## Create countries and regions

```csharp
var dto = new CountryDto(); 
var countryRow = dto.Country.NewCountryRow(); 
  countryRow.Name = "Country Name"; 
  countryRow.Code = "AAA"; 
//Three digit country code. 
  countryRow.Ordering = 0;   
  countryRow.Visible = true;  
if (countryRow.RowState == DataRowState.Detached)     
  dto.Country.Rows.Add(countryRow);  
  dto.EnforceConstraints = false; 
var region = dto.StateProvince.NewStateProvinceRow(); 
  region.Name = "My Region"; 
  region.Ordering = 0; 
  region.Visible = true; 
  region.CountryId = dto.Country[0].CountryId;  
if (region.RowState == DataRowState.Detached)     
  dto.StateProvince.Rows.Add(region);  
  dto.EnforceConstraints = true;  
  CountryManager.SaveCountry(dto);
```

## Update countries and regions

```csharp
var dto = CountryManager.GetCountry("USA", true); 
var countryRow = dto.Country[0]; 
  countryRow.Ordering = 20; 
  countryRow.Visible = false;  
var ca = countryRow.GetStateProvinceRows().FirstOrDefault(x => x.Name.Equals("California")); 
  ca.Ordering = 5; 
  CountryManager.SaveCountry(dto);
```

## Delete countries and regions

```csharp
var dto = CountryManager.GetCountry("USA", true); var countryRow = dto.Country[0]; 
  countryRow.Delete(); 
  CountryManager.SaveCountry(dto);
```