How to Say "one thousand" in Spanish
The Spanish word for “one thousand” is “mil” — A1 level. This is a very common word in everyday Spanish.

Examples
Este teléfono cuesta mil euros.
This phone costs a thousand euros.
La ciudad fue fundada en el año mil novecientos.
The city was founded in the year nineteen hundred.
Necesito dos mil dólares para el viaje.
I need two thousand dollars for the trip.
Stays the Same in Plural
Unlike other numbers, 'mil' doesn't change when you put another number before it. It's 'dos mil' (2,000), 'cinco mil' (5,000), 'cien mil' (100,000), etc. The word 'mil' itself stays the same.
No 'Un' Needed
When you mean exactly 1,000, you just say 'mil', not 'un mil'. For example, 'Tengo mil libros' (I have a thousand books).
Saying 'un mil'
Mistake: “Compré un mil cosas en el mercado.”
Correction: Compré mil cosas en el mercado. You only need to say 'mil' for 'one thousand'. The 'un' is not necessary and sounds unnatural.
Related Translations
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