diff --git a/Octokit.Reactive/Clients/IObservableReactionsClient.cs b/Octokit.Reactive/Clients/IObservableReactionsClient.cs
index 8ba0e87b..2cedf69a 100644
--- a/Octokit.Reactive/Clients/IObservableReactionsClient.cs
+++ b/Octokit.Reactive/Clients/IObservableReactionsClient.cs
@@ -1,4 +1,7 @@
-namespace Octokit.Reactive
+using System;
+using System.Reactive;
+
+namespace Octokit.Reactive
 {
     public interface IObservableReactionsClient
     {
@@ -33,5 +36,13 @@
         /// Refer to the API documentation for more information: https://developer.github.com/v3/reactions/
         /// </remarks>
         IObservablePullRequestReviewCommentReactionsClient PullRequestReviewComment { get; }
+
+        /// <summary>
+        /// Delete a reaction.
+        /// </summary>
+        /// <remarks>https://developer.github.com/v3/reactions/#delete-a-reaction</remarks>        
+        /// <param name="number">The reaction id</param>        
+        /// <returns></returns>
+        IObservable<Unit> Delete(int number);
     }
 }
diff --git a/Octokit.Reactive/Clients/ObservableReactionsClient.cs b/Octokit.Reactive/Clients/ObservableReactionsClient.cs
index f2f44ae8..3cd3e9b3 100644
--- a/Octokit.Reactive/Clients/ObservableReactionsClient.cs
+++ b/Octokit.Reactive/Clients/ObservableReactionsClient.cs
@@ -1,11 +1,19 @@
-namespace Octokit.Reactive
+using System;
+using System.Reactive;
+using System.Reactive.Threading.Tasks;
+
+namespace Octokit.Reactive
 {
     public class ObservableReactionsClient : IObservableReactionsClient
     {
+        readonly IReactionsClient _client;
+
         public ObservableReactionsClient(IGitHubClient client)
         {
             Ensure.ArgumentNotNull(client, "client");
 
+            _client = client.Reaction;
+
             CommitComment = new ObservableCommitCommentReactionsClient(client);
             Issue = new ObservableIssueReactionsClient(client);
             IssueComment = new ObservableIssueCommentReactionsClient(client);
@@ -43,5 +51,16 @@
         /// Refer to the API documentation for more information: https://developer.github.com/v3/reactions/
         /// </remarks>
         public IObservablePullRequestReviewCommentReactionsClient PullRequestReviewComment { get; private set; }
+
+        /// <summary>
+        /// Delete a reaction.
+        /// </summary>
+        /// <remarks>https://developer.github.com/v3/reactions/#delete-a-reaction</remarks>        
+        /// <param name="number">The reaction id</param>        
+        /// <returns></returns>
+        public IObservable<Unit> Delete(int number)
+        {
+            return _client.Delete(number).ToObservable();
+        }
     }
 }
diff --git a/Octokit/Clients/IReactionsClient.cs b/Octokit/Clients/IReactionsClient.cs
index 08f14c44..fbf76569 100644
--- a/Octokit/Clients/IReactionsClient.cs
+++ b/Octokit/Clients/IReactionsClient.cs
@@ -1,4 +1,6 @@
-namespace Octokit
+using System.Threading.Tasks;
+
+namespace Octokit
 {
     /// <summary>
     /// A client for GitHub's Reactions Events API.
@@ -39,5 +41,13 @@
         /// Refer to the API documentation for more information: https://developer.github.com/v3/reactions/
         /// </remarks>
         IPullRequestReviewCommentReactionsClient PullRequestReviewComment { get; }
+
+        /// <summary>
+        /// Delete a reaction.
+        /// </summary>
+        /// <remarks>https://developer.github.com/v3/reactions/#delete-a-reaction</remarks>        
+        /// <param name="number">The reaction id</param>        
+        /// <returns></returns>
+        Task Delete(int number);
     }
 }
diff --git a/Octokit/Clients/ReactionsClient.cs b/Octokit/Clients/ReactionsClient.cs
index 9c1d110b..deb8033a 100644
--- a/Octokit/Clients/ReactionsClient.cs
+++ b/Octokit/Clients/ReactionsClient.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Threading.Tasks;
 
 namespace Octokit
 {
@@ -47,6 +48,17 @@ namespace Octokit
         /// <remarks>
         /// Refer to the API documentation for more information: https://developer.github.com/v3/reactions/
         /// </remarks>
-        public IPullRequestReviewCommentReactionsClient PullRequestReviewComment { get; private set; }      
+        public IPullRequestReviewCommentReactionsClient PullRequestReviewComment { get; private set; }
+
+        /// <summary>
+        /// Delete a reaction.
+        /// </summary>
+        /// <remarks>https://developer.github.com/v3/reactions/#delete-a-reaction</remarks>        
+        /// <param name="number">The reaction id</param>        
+        /// <returns></returns>
+        public Task Delete(int number)
+        {
+            return ApiConnection.Delete(ApiUrls.Reactions(number));
+        }
     }
 }
diff --git a/Octokit/Helpers/ApiUrls.cs b/Octokit/Helpers/ApiUrls.cs
index 2a9c168b..1ad8dc81 100644
--- a/Octokit/Helpers/ApiUrls.cs
+++ b/Octokit/Helpers/ApiUrls.cs
@@ -2926,5 +2926,15 @@ namespace Octokit
         {
             return "repositories/{0}/subscribers".FormatUri(repositoryId);
         }
+
+        /// <summary>
+        /// Returns the <see cref="Uri"/> for deleting a reaction.
+        /// </summary>
+        /// <param name="number">The reaction number</param>
+        /// <returns>The <see cref="Uri"/> that lists the watched repositories for the authenticated user.</returns>
+        public static Uri Reactions(int number)
+        {
+            return "reactions/{0}".FormatUri(number);
+        }
     }
 }