If you don't find your town:
The list includes all generic town names, which any map can change for its own. This is certainly what's happened if you don't find the name you're looking for.

Town Specializations: Inferno

Ur-Alzevoth

When the Demons come they come in force, with supplies -- like ships -- built by armies of unwilling slaves. This town happened to be an important portal with a major shipyard. Now that the invasion forces have arrived the ships, no longer needed, are being sold off quickly.

  • » Countless Fleet: The town's shipyard builds ships for half the standard cost (500 Gold + 5 Wood).

Ur-Chardros

Ur-Chardros, the Demon smithy, is located by a volcanic vent that serves as a forge for making legendary armour. Clad in such a suit, an Ur-Chardros defender can sustain blows that would kill anybody else.

  • » Attack +1, Defense +1: All the troops guarding this town get +1 bonus to their Attack and Defense.

Ur-Drask

As with all Demon towns, the backbone of industry in Ur-Drask is the backs of slaves. Here, they cull precious stones from flooded veins of subterranean lakes, and the extra emeralds that grace the coffers of the town are there at the price of hundreds of lives.

  • » Gems Wealth: +2 Gems per week (on day 1).

Ur-Estaroth

Not located conveniently near a natural source of flame, the residents of Ur-Estaroth keep their forges fueled with endless wagon trains of wood brought or plundered from other regions. Their byproducts of ash and charcoal provide additional sources of revenue, but the stacks of wood are the sight for which the town is best known.

  • » Wood Producer: The Resource Silo produces one extra Wood each day.

Ur-Gehenna

Demon legend states that a nearby abyss is inhabited by a vengeful incarnation of Urgash, an elemental of lava that feeds on coal. Demon overseers ensure that their slaves work overtime, supplying coal to the abyss while providing tons of ore to the Demon foundries.

  • » Ore Producer: The Resource Silo produces one extra Ore each day.

Ur-Gorthol

Ur-Gorthol was the one of the Sovereign's strongholds before he was defeated and imprisoned in Sheogh. It retains the skills it developed during that era, consistently turning out the finest ammunition as it did for the Sovereign's favorite sport -- hunting, preferably two-legged prey.

  • » Ammo Cart Specialist: The town's Blacksmith also offers Ammo Carts at normal price.

Ur-Henoch

A Demon of legendary savagery, Az-Henoch gave this town not just his name but also the vast burial mounds around it. Filled with the bodies of fallen enemies, these gruesome mass graves and their awful history lower the morale of any troops who dare to attack.

  • » Morale - 1: All the enemies assaulting this town get -1 penalty to their Morale.

Ur-Ischin

Ur-Ischin is named for a fiery lake near which it was built. Feral imps descend often to play in the flames and feed on the ancient carbon deposits that fuel it, it is a pastime for the locals to snare and train the imps, which they do with pleasure. The town is never lacking for willing imps among its troops.

  • » Tier 1 Military Trainer: +2 to tier 1 creature's growth.

Ur-Kharg

It is said in Demon legend that Ur-Kharg is the place where Urgash crafted the first Demon from burning obsidian. As such, it is a holy place and the defenses are bolstered by constant streams of fanatic pilgrims, giving it additional defensive strength.

  • » Tier 2 Military Trainer: +1 to tier 2 creature's growth.

Ur-Korsh

The Elves, sometimes to their own chagrin, are exacting when their word is given and their honor is in question. That is why, in spite of their implacable enmity, every week they bring crystals to the Demons of Ur-Korsh as part of an age-old ransom.

  • » Crystal Wealth: +2 Crystal per week (on day 1).

Ur-Kurgan

All that is remembered of the founders of this town is that they were wiped out by Demons in a long and bloody siege. When the city was rebuilt, all the rage and desperation of the defenders was fused into its towers. These grim spires now inflict additional damage on anyone who dares to attack.

  • » Heavy towers: Shooting towers of this town do more damage to an enemy
    Defense towers have a 25% bonus to damage.

Ur-Mangor

There's a monument in the middle of town to Mangor, a Demon atypically wise in the ways of healing that was killed -- slowly -- for his place in a conspiracy. His legacy is strong, however, and this town is the only place where one can buy a First Aid Tent.

  • » First Aid Tent Specialist: The town's blacksmith also offers First Aid Tents at normal price.

Ur-Melphas

A great Demon architect is buried in this town, which bears his name. Acknowledged even by his enemies as a master craftsman, his workshop and students were wiped out during the War of the Gray Alliance. As a result, Demonkind has never matched the perfection of the walls here.

  • » Strong walls: Castle walls of this towm are harder to destroy
    Each defense structure (walls, towers and gate) has 50 more Hit Points.

Ur-Nebyrzias

Ur-Nebyrzias was the Sovereign's stronghold before he was defeated and imprisoned in Sheogh. It retains the skills it developed during that era, consistently turning out the finest ammunition as it did for the Sovereign's favorite sport -- hunting, preferably two-legged prey.

  • » Ammo Cart Specialist: The town's Blacksmith also offers Ammo Carts at normal price.

Ur-Raag

It is said that nothing hates a Demon like another Demon. Ur-Raag is a proof of this, an angry Demon overlord summoned a horde of archdevils and laid a curse for bad luck on his rival who ran the town. The effects of that curse are still felt to this day.

  • » Luck - 1: All the enemies assaulting this town get -1 penalty to their Luck.

Ur-Rioch

Nobody wants to live in Ur-Rioch, a town notorious for its unbearable taxes and extortion, for Demons it is a place of exile. Guilty Demons serve their hard time here, handing over all their money to the town treasury - which, in its turn, makes a hefty contribution to the Sovereign.

  • » Mountains of Gold: Adds 250 Gold to daily income.

Ur-Shangor

With so many slaves required to run their economy, and with slaves having such a high mortality rate, the question of what to do with the remains can be a problem. Not in this town, however, as the vast kennels of Hellhounds and Cerberus for which Ur-Shangor is famous require a great deal of provender.

  • » Tier 3 Military Trainer: +1 to tier 3 creature's growth.

Ur-Sphaal

Demons have their own ways of slaking their lusts and this town is no exception, everything and everybody is for sale. It's a town of palaces and hovels, gambling houses and markets. Government is a treacherous business, there is always someone who wants control of this town where anything can be had for a price.

  • » Merchant's Fair: The town's marketplace offers better rates (counts as 2 marketplaces).

Ur-Tarsh

Even by Demon standards the noise, the smell, and the food make Ur-Tarsh an unpleasant place. Battle-hardened heroes start looking for a way out after a day or two, as a result they tend to be willing to accept much lower wages.

  • » Heroes Hiring Place: Save 10% gold when recruiting heroes.

Ur-Toth

As with all Demon towns, the backbone of industry in Ur-Toth is the backs of slaves. Here, they cull precious stones from flooded veins of subterranean lakes, and the extra emeralds that grace the coffers of the town are there at the price of hundreds of lives.

  • » Gems Wealth: +2 Gems per week (on day 1).

Ur-Vesphaal

Ur-Vesphaal is the former Demon capital, first the residence and later the mausoleum of the current Sovereign's predecessor. When the Sovereign killed him and moved the seat of power away, Ur-Vesphaal was slowly taken over by what was left of the competing army -- succubae. Now it's their town.

  • » Tier 4 Military Trainer: +1 to tier 4 creature's growth.

Ur-Vramin

Everybody who comes to Ur-Vramin for the first time sees the huge ear adorning the town gates. It's the symbol of this town of spies, gossips, and snitches. Ur-Vramin is famous for its Guild of Thieves, which always has information about everything happening in Ashan

  • » Information Center: The town's thieves guild offers more information (counts as 2 thieves guilds).
This information comes from the Heroes V release version (v3.0).

Thanks to sfidanza for the work on this page.
Thanks to ThE_HyDrA for creating and looking after the Heroes 5 section of Age of Heroes!