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These are V1 (KlerosLiquid) deployment addresses. For V2 (KlerosCore on Arbitrum), see V2 Deployment Addresses.

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Ethereum Mainnet (Chain ID: 1)

ContractAddress
KlerosLiquid0x988b3A538b618C7A603e1c11Ab82Cd16dbE28069
PNK Token0x93ED3FBe21207Ec2E8f2d3c3de6e058Cb73Bc04d
PolicyRegistry0xcf1f07713d5193fae5c1653c9f61953d048bece4
SortitionSumTreeFactory0x180eba68d164c3f8c3f6dc354125ebccf4dfcb86
KlerosLiquid Extra Views0x2B562ea613ad2f58746935C842d09EB147E1E940
Governor (kleros.eth)0xe5bcEa6F87aAEe4a81f64dfDB4d30d400e0e5cf4
Governor (poh.eth)0x327a29fcE0a6490E4236240Be176dAA282EcCfdF
Governor (ubi-voting.eth)0x7510c77163683448b8Dc8fe9e019d9482Be1ed2b
Governor (fork-dao.eth)0xf7dE5537eCD69a94695fcF4BCdBDeE6329b63322
ArbitrableProxy0x99489d7bb33539f3d1a401741e56e8f02b9ae0cf
Transaction Batcher0x82458d1c812d7c930bb3229c9e159cbabd9aa8cb
RNGenerator0x90992fb4E15ce0C59aEFfb376460Fda4Ee19C879
Escrow (ETH)0x0d67440946949FE293B45c52eFD8A9b3d51e2522
ArbitrableTokenList (T2CR)0xebcf3bca271b26ae4b162ba560e243055af0e679
ArbitrableAddressList (Ethfinex)0x916deab80dfbc7030277047cd18b233b3ce5b4ab
ArbitrableAddressList (ERC20)0xCb4Aae35333193232421E86Cd2E9b6C91f3B125F
Proof of Humanity0xC5E9dDebb09Cd64DfaCab4011A0D5cEDaf7c9BDb
KlerosConnector for Unslashed0xe0e1bc8C6cd1B81993e2Fcfb80832d814886eA38
UBI Pool0xa27bfea336bc7058ff1297eeff2732389f8b208f
UBI ProxyAdmin0x2b59500ad441bf5accf8ff89449552b6487132e0

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Realitio Arbitration Proxies (Ethereum)

Used for Reality.eth + Kleros oracle integration and Safe Zodiac governance.
ContractAddress
Realitio Arbitrator Proxy (original, no appeals)0xd47f72a2d1d0e91b0ec5e5f5d02b2dc26d00a14d
Realitio Proxy 2.1 With Appeals (General Purpose)0x728cba71a3723caab33ea416cb46e2cc9215a596
Realitio Proxy 2.1 With Appeals (Gnosis Zodiac)0xf72cfd1b34a91a64f9a98537fe63fbab7530adca
Realitio Cross-Chain xDAI Foreign Proxy (non-2.1)0x2f0895732bfacdcf2fdb19962fe609d0da695f21
Realitio Cross-chain xDAI Foreign Proxy (Realitio 2.1)0x79d0464ec27f67663dadf761432fc8dd0aea3d49
Realitio Cross-chain Polygon Foreign Proxy0x776e5853e3d61b2dfb22bcf872a43bf9a1231e52

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Gnosis Chain (Chain ID: 100)

ContractAddress
xKlerosLiquid0x9C1dA9A04925bDfDedf0f6421bC7EEa8305F9002
wrappedPNK (stPNK)0xcb3231aBA3b451343e0Fddfc45883c842f223846
PolicyRegistry0x9d494768936b6bDaabc46733b8D53A937A6c6D7e
KlerosLiquid/PNK ProxyAdmin0xD1a711a863aFB85D1b4E721DcB3e48C477E46475
KlerosLiquid Extra Views0xFA71f907B48f27d22f670d9E446f8137b0769e4B
SortitionSumTreeFactory0x7AE716d9935F41F173D944FE6557c1e117d561E9
Transaction Batcher0x6426800F8508b15AED271337498fa5e7D0794d46

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Realitio Cross-Chain Proxies (Gnosis Chain)

ContractAddress
Realitio Cross-Chain xDAI Home Proxy0x29f39de98d750eb77b5fafb31b2837f079fce222
Realitio v2.1 with Appeals (for Moderate)0xe04f5791d671d5C4e08ab49b39807087B591ea3e
Realitio Cross-chain xDAI Home Proxy (2.1) — Omen0xe40DD83a262da3f56976038F1554Fe541Fa75ecd

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LGTCR Registries (Gnosis Chain)

These registries power Kleros Scout and are consumed by block explorers (Etherscan, Scout) for address tagging.
ContractAddress
LGTCR Tokens0x70533554fe5c17CAf77fE530f77eAB933B92af60
LGTCR Address Tags0x66260C69d03837016d88c9877e61e08Ef74C59F2
LGTCR Contract Domain Names0x957A53A994860BE4750810131d9c876b2f52d6E1

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V1 Subcourt IDs (Ethereum Mainnet)

The General Court ID is 0 on V1 (different from V2 where General Court is ID 1). Check current subcourt IDs and parameters on KlerosBoard.

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Generating extraData

To specify a subcourt and juror count in V1: 
const generateArbitratorExtraData = (subcourtID, noOfVotes) =>
  `0x${parseInt(subcourtID, 10).toString(16).padStart(64, "0")}${parseInt(noOfVotes, 10).toString(16).padStart(64, "0")}`;

// Example: General Court (0), 3 jurors
generateArbitratorExtraData(0, 3);
// "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003"

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Further Reading