diff --git a/backend/src/data/DefaultLogMessages.json b/backend/src/data/DefaultLogMessages.json
index dd992775..02b93494 100644
--- a/backend/src/data/DefaultLogMessages.json
+++ b/backend/src/data/DefaultLogMessages.json
@@ -51,6 +51,7 @@
   "CASE_CREATE": "✏ {userMention(mod)} manually created new **{caseType}** case (#{caseNum})",
   "CASE_DELETE": "✂️ **Case #{case.case_number}** was deleted by {userMention(mod)}",
 
+  "MASSUNBAN": "⚒ {userMention(mod)} mass-unbanned {count} users",
   "MASSBAN": "⚒ {userMention(mod)} massbanned {count} users",
   "MASSMUTE": "📢🚫 {userMention(mod)} massmuted {count} users",
 
diff --git a/backend/src/data/LogType.ts b/backend/src/data/LogType.ts
index 14dadb69..60f6f9f7 100644
--- a/backend/src/data/LogType.ts
+++ b/backend/src/data/LogType.ts
@@ -39,6 +39,7 @@ export enum LogType {
 
   CASE_CREATE,
 
+  MASSUNBAN,
   MASSBAN,
   MASSMUTE,
 
diff --git a/backend/src/plugins/ModActions/ModActionsPlugin.ts b/backend/src/plugins/ModActions/ModActionsPlugin.ts
index 876ab044..993de951 100644
--- a/backend/src/plugins/ModActions/ModActionsPlugin.ts
+++ b/backend/src/plugins/ModActions/ModActionsPlugin.ts
@@ -17,6 +17,7 @@ import { SoftbanCmd } from "./commands/SoftbanCommand";
 import { BanCmd } from "./commands/BanCmd";
 import { UnbanCmd } from "./commands/UnbanCmd";
 import { ForcebanCmd } from "./commands/ForcebanCmd";
+import { MassunbanCmd } from "./commands/MassUnbanCmd";
 import { MassbanCmd } from "./commands/MassBanCmd";
 import { AddCaseCmd } from "./commands/AddCaseCmd";
 import { CaseCmd } from "./commands/CaseCmd";
@@ -67,6 +68,7 @@ const defaultOptions = {
     can_ban: false,
     can_view: false,
     can_addcase: false,
+    can_massunban: false,
     can_massban: false,
     can_massmute: false,
     can_hidecase: false,
@@ -90,6 +92,7 @@ const defaultOptions = {
     {
       level: ">=100",
       config: {
+        can_massunban: true,
         can_massban: true,
         can_massmute: true,
         can_hidecase: true,
@@ -134,6 +137,7 @@ export const ModActionsPlugin = zeppelinGuildPlugin<ModActionsPluginType>()("mod
     ForcebanCmd,
     MassbanCmd,
     MassmuteCmd,
+    MassunbanCmd,
     AddCaseCmd,
     CaseCmd,
     CasesUserCmd,
diff --git a/backend/src/plugins/ModActions/commands/MassUnbanCmd.ts b/backend/src/plugins/ModActions/commands/MassUnbanCmd.ts
new file mode 100644
index 00000000..897cc25f
--- /dev/null
+++ b/backend/src/plugins/ModActions/commands/MassUnbanCmd.ts
@@ -0,0 +1,125 @@
+import { modActionsCmd, IgnoredEventType } from "../types";
+import { commandTypeHelpers as ct } from "../../../commandTypes";
+import { sendErrorMessage, sendSuccessMessage } from "../../../pluginUtils";
+import { stripObjectToScalars } from "../../../utils";
+import { isBanned } from "../functions/isBanned";
+import { formatReasonWithAttachments } from "../functions/formatReasonWithAttachments";
+import { CaseTypes } from "../../../data/CaseTypes";
+import { TextChannel } from "eris";
+import { waitForReply } from "knub/dist/helpers";
+import { ignoreEvent } from "../functions/ignoreEvent";
+import { CasesPlugin } from "../../Cases/CasesPlugin";
+import { LogType } from "../../../data/LogType";
+
+export const MassunbanCmd = modActionsCmd({
+  trigger: "massunban",
+  permission: "can_massunban",
+  description: "Mass-unban a list of user IDs",
+
+  signature: [
+    {
+      userIds: ct.string({ rest: true }),
+    },
+  ],
+
+  async run({ pluginData, message: msg, args }) {
+    // Limit to 100 users at once (arbitrary?)
+    if (args.userIds.length > 100) {
+      sendErrorMessage(pluginData, msg.channel, `Can only mass-unban max 100 users at once`);
+      return;
+    }
+
+    // Ask for unban reason (cleaner this way instead of trying to cram it into the args)
+    msg.channel.createMessage("Unban reason? `cancel` to cancel");
+    const unbanReasonReply = await waitForReply(pluginData.client, msg.channel as TextChannel, msg.author.id);
+    if (!unbanReasonReply || !unbanReasonReply.content || unbanReasonReply.content.toLowerCase().trim() === "cancel") {
+      sendErrorMessage(pluginData, msg.channel, "Cancelled");
+      return;
+    }
+
+    const unbanReason = formatReasonWithAttachments(unbanReasonReply.content, msg.attachments);
+
+    // Ignore automatic unban cases and logs for these users
+    // We'll create our own cases below and post a single "mass unbanned" log instead
+    args.userIds.forEach(userId => {
+      // Use longer timeouts since this can take a while
+      ignoreEvent(pluginData, IgnoredEventType.Unban, userId, 120 * 1000);
+      pluginData.state.serverLogs.ignoreLog(LogType.MEMBER_UNBAN, userId, 120 * 1000);
+    });
+
+    // Show a loading indicator since this can take a while
+    const loadingMsg = await msg.channel.createMessage("Unbanning...");
+
+    // Unban each user and count failed unbans (if any)
+    const failedUnbans: Array<{ userId: string; reason: UnbanFailReasons }> = [];
+    const casesPlugin = pluginData.getPlugin(CasesPlugin);
+    for (const userId of args.userIds) {
+      if (!(await isBanned(pluginData, userId))) {
+        failedUnbans.push({ userId, reason: UnbanFailReasons.NOT_BANNED });
+        continue;
+      }
+
+      try {
+        await pluginData.guild.unbanMember(userId, unbanReason != null ? encodeURIComponent(unbanReason) : undefined);
+
+        await casesPlugin.createCase({
+          userId,
+          modId: msg.author.id,
+          type: CaseTypes.Unban,
+          reason: `Mass unban: ${unbanReason}`,
+          postInCaseLogOverride: false,
+        });
+      } catch (e) {
+        failedUnbans.push({ userId, reason: UnbanFailReasons.UNBAN_FAILED });
+      }
+    }
+
+    // Clear loading indicator
+    loadingMsg.delete();
+
+    const successfulUnbanCount = args.userIds.length - failedUnbans.length;
+    if (successfulUnbanCount === 0) {
+      // All unbans failed - don't create a log entry and notify the user
+      sendErrorMessage(pluginData, msg.channel, "All unbans failed. Make sure the IDs are valid and banned.");
+    } else {
+      // Some or all unbans were successful. Create a log entry for the mass unban and notify the user.
+      pluginData.state.serverLogs.log(LogType.MASSUNBAN, {
+        mod: stripObjectToScalars(msg.author),
+        count: successfulUnbanCount,
+        reason: unbanReason,
+      });
+
+      if (failedUnbans.length) {
+        const notBanned = failedUnbans.filter(x => x.reason === UnbanFailReasons.NOT_BANNED);
+        const unbanFailed = failedUnbans.filter(x => x.reason === UnbanFailReasons.UNBAN_FAILED);
+
+        let failedMsg = "";
+        if (notBanned.length > 0) {
+          failedMsg += `${notBanned.length}x ${UnbanFailReasons.NOT_BANNED}:`;
+          notBanned.forEach(fail => {
+            failedMsg += " " + fail.userId;
+          });
+        }
+        if (unbanFailed.length > 0) {
+          failedMsg += `\n${unbanFailed.length}x ${UnbanFailReasons.UNBAN_FAILED}:`;
+          unbanFailed.forEach(fail => {
+            failedMsg += " " + fail.userId;
+          });
+        }
+
+        sendSuccessMessage(
+          pluginData,
+          msg.channel,
+          `Unbanned ${successfulUnbanCount} users, ${failedUnbans.length} failed:\n${failedMsg}`,
+        );
+      } else {
+        sendSuccessMessage(pluginData, msg.channel, `Unbanned ${successfulUnbanCount} users successfully`);
+      }
+    }
+  },
+});
+
+enum UnbanFailReasons {
+  NOT_BANNED = "Not banned",
+  UNBAN_FAILED = "Unban failed",
+}
diff --git a/backend/src/plugins/ModActions/types.ts b/backend/src/plugins/ModActions/types.ts
index 4fb6ba5e..cf492480 100644
--- a/backend/src/plugins/ModActions/types.ts
+++ b/backend/src/plugins/ModActions/types.ts
@@ -35,6 +35,7 @@ export const ConfigSchema = t.type({
   can_ban: t.boolean,
   can_view: t.boolean,
   can_addcase: t.boolean,
+  can_massunban: t.boolean,
   can_massban: t.boolean,
   can_massmute: t.boolean,
   can_hidecase: t.boolean,