There are a total of 19 3-letter words containing 'es', and the number may vary in different dictionaries. You can specify the dictionary and order.

• aes ₃
• ese ₃
• esq ₁₂
• ess ₃
• hes ₅
• kes ₇
• oes ₃
• pes ₆
• res ₃
• ses ₃
• xes ₁₀
• yes ₅
• zes ₁₂
• bes ₅
• est ₃
• fes ₆
• les ₃
• mes ₅
• tes ₃

There are 19 3-letter words containing "es" in the well-known word game dictionary, 12 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 12 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 13 in the Words with Friends (WWF) dictionary.