I have no water what do I check first I have a farm well

There could be many reasons you have no water from a well. Here is what I would check.

I am assuming you have no water in the whole house.

1) Check to see if the pump is running, if it is not, see 2 & 3 below, otherwise, check 4.
2) Check the breaker for the pump motor.
3) Check the on/off switch for the pump motor.
4) If the pump is running and you have no water, you could have lost the prime or you might need a new pump. At this point I would call a plumber who specializes in well pumps.

Follow advice 1 to 3 above. I wouldn't jump into 4 just yet.

1. Is your pump in the well or above ground?
2. Do you have any kind of filter/softener on your system?
3. If you have a pressure gauge on your system, what does it read?