I was given 6 mos. of tourist visa in USA... it will expire this mo. is it possible to apply for an

Yes you may request to extend your stay by filing Form I-539, Application to Extend/Change Non-immigrant Status. You can download this form and find all of the instructions on how to complete it and where to file the completed form on the two websites below.

You should be aware that the USCIS recommends that you apply to extend your stay at least 45 days before your authorized stay expires and that by filing the form the USCIS makes no guarantee that your request will be granted.

I was given 6 mos. of tourist visa in USA... it will expire this mo. is it possible to apply for an extension?opera singer

Yes you can apply, but does not mean it will be approved..

I was given 6 mos. of tourist visa in USA... it will expire this mo. is it possible to apply for an extension?amc theater opera theater

you can allways try..
First let me commend you on being here in the US legally and wanting to extend your visit -- these days is Heroic to be here legally

Yes you can always file and request an extention - doesn't mean you will get approved but don't delay in filing your request
Look at CPG's answer. It's 100% correct.

"Yes you may request to extend your stay by filing Form I-539, Application to Extend/Change Non-immigrant Status. You can download this form and find all of the instructions on how to complete it and where to file the completed form on the two websites below."

Of course, you were not given a "6 mos. of tourist visa in USA." You were given permission to stay in the U.S. for six months. A visa is a document used to apply for admission into a country. The U.S. does not issue visas at its borders.

It issues permits that show a nonimmigrant classification and a period of authorized stay. That is not a visa.
Yes, you can apply for an extension of your I-94 however, this must be requested at least 45 days before the expiration of the allowed period of stay. Also, it is not guaranteed that you would be given approval therefore, if they would deny your application to extend your non-immigrant status, and it was when after 6 months since when you were initially admitted for, you would be left out of status. If you are out of status for 1 day to 180 days you are barred/banned to re-enter the US for at least 3 years, and if over 180 days or 6 months, you cannot re-enter the US for at least 10 years. Unless you have the intention to over stay and you have a petition that is almost current, or if you find an employer that can petition you as a skilled/non-skilled worker?
What the hell haven't you seen, yet??